Yeah, their lack of a satisfactory response is the final nail in their coffin. This incident escalates my consulting advice about Ubuntu from “not recommended” to “switch immediately”.

Some of my clients may be surprised by this change, as I once advocated for Ubuntu as a good choice for a development and deployment platform. While that has not been true for quite a while, they have now jumped the shark into eel-infested waters; I cannot take them seriously any longer.

The more I look at this the angrier I get. This is a CVE that Anthropic claims can get a Remote Code Execution on vulnerable systems, which includes default Ubuntu installs running any sort of Go server like Caddy. Bad enough that I shut down my personal website and self-hosted tools (sorry for any typos, my grammar checker is also down).

And this is how Ubuntu describes the vulnerability to sysadmins:

  In the Linux kernel, the following vulnerability has been resolved:
  ipv4: free inet_opt and ireq_opt after an RCU grace period
  tcp_v4_syn_recv_sock() transfers ownership of ireq->ireq_opt to the
  child socket (newinet->inet_opt) without copying it.
  Another cpu can concurrently process a retransmitted SYN for the same
  request socket, and send a SYNACK from tcp_check_req().
  tcp_v4_send_synack() and inet_csk_route_req() read ireq->ireq_opt
  under rcu_read_lock() only, and ip_build_and_send_pkt() and
  ip_options_build() then read opt->optlen twice.
  Note that the SYNACK timer itself is not an issue: it holds a
  reference on its request socket, and inet_csk_reqsk_queue_drop()
  calls timer_delete_sync() before the child can be freed.
  Since commit 079096f103fa (“tcp/dccp: install syn_recv requests
  into ehash table”), request sockets are processed without holding
  the listener lock, so nothing prevents the child socket from being
  freed while the SYNACK is still being built. TCP child sockets do
  not have SOCK_RCU_FREE, and inet_sock_destruct() frees inet_opt
  with a plain kfree(), leading to a use-after-free in
  ip_options_build().
  A similar issue exists with request socket migration
  (net.ipv4.tcp_migrate_req=1, or a BPF_SK_REUSEPORT_SELECT_OR_MIGRATE
  program). reqsk_timer_handler() clones the request socket with
  inet_reqsk_clone(), so that the old request socket and its clone
  share the same ireq_opt, then reqsk_migrate_reset() clears the
  pointer in the old one. Another cpu holding a reference on the old
  request socket can still be using these options (sending a SYNACK,
  or creating a child in tcp_v4_syn_recv_sock()) when the clone is
  freed, and tcp_v4_reqsk_destructor() also uses a plain kfree().
  Readers already use RCU, and other paths replacing inet_opt
  (do_ip_setsockopt(), cipso_v4_sock_setattr()...) already use
  kfree_rcu(). Use kfree_rcu() in inet_sock_destruct() and
  tcp_v4_reqsk_destructor() as well.
  IPv6 is not affected by the first issue, because tcp_v6_syn_recv_sock()
  duplicates the options. tcp_v6_reqsk_destructor() has the same
  migration issue with ipv6_opt, which is only set by CALIPSO. This
  will be addressed in a separate patch.

How is this in any way, shape, or form acceptable two weeks after the CVE was published?

They're totally asleep at the wheel, it's malpractice. The pitch for RHEL is highly competent maintenance you can't get elsewhere

I believe RHEL/Alma/Rocky has released patches today. I have a notice about they have done so.

I use NixOS btw

Is RHEL really unpatched still? Looks like patches came yesterday: https://access.redhat.com/security/cve/cve-2026-98432

I think it's just brand, ubuntu was what I knew from using it as a personal desktop and then it's the default/most obvious option for a lot of providers, I think even 10+ years ago AWS EC2 defaulted to it above Debian, digital ocean too I think?

I don't remember why exactly but it was definitely just 'linux VPS = Ubuntu' for a long time. I think they got reputation as being the 'just works' option because they were happier to include some non-free graphics drivers etc where Debian was the more pure option but most end users didn't care

But since they added snap and I started running into issues with trying to install Docker etc a few years ago I default to Debian now and most of the time I don't even know which it is.

> What is Ubuntu offering that Debian doesn't provide?

Surprised how many answers here are on "social" reasons, and ignoring that Ubuntu does provide genuine additions to Debian.

Ubuntu includes additional proprietary drivers to Debian. So there are legitimate hardware cases were Ubuntu will work out the box and Debian won't. I can't speak for how many people need those drivers, and how much of choice is down to defaults/inertia etc.

From hearing interviews with PopOS folk, I think this is also a big reason people choose Ubuntu as a base for a lot of Distros instead of Debian.

Back in the day in 2008, Linux was niché.

It had issues all the time, and finding solutions required searching online, manually. Time consuming, difficult process. Very un-beginner-friendly.

From the throve of all possible distros, one stood out. Ubuntu. Very popular. Askubuntu Forums (with coffee beans denoting ranks) was the place when, 9/10 times, the answer to your problem could be found.

So when your fedora friend cried trying to get his camera and sound working, you either found the solutions already, or asked for them and got them. Usually the former.

That was the biggest advantage of Ubuntu. Big community and wealth of troubleshooting knowledge already available. And it had the opinion of a beginner friendly system. Which made the community grow and created a large market/userbase for help threads/tutorials.

Add to that, that people are creatures of habit and 'voila - you have a lot of people sticking to Ubuntu just because they never got so pissed at them that they would change their distro.

The traditional answer is that Debian is a bit slower-moving in both the Linux kernel and userland, so people who want current versions of popular software often find that they have to do some extra work in Debian.

A gradually increasing number of popular userland applications have been publishing their own apt repositories however so this is less of a problem now than it used to be.

Over the years though I've found that I much prefer Debian's relative stability and more thoughtful, if slightly plodding, release cadence.

Ubuntu is a Debian distribution that releases more often. A faster update cycle for their packages is basically their entire reason for existing.

I may be biased as a Debian user, but if Ubuntu now reacts slower than Debian this may push some people to reconsider their choice.

For me it's just because I've been using Ubuntu full time since 2008 and has served me well my entire career, I think it's fair to say it's the flagship desktop OS that introduced many to Linux.

I feel like we're close to a post-distro era of operating systems though. My ansible playbook customizes so much already it wouldn't take too much more to just start from debian tbh.

Ubuntu offers a path from free use to paid first party support. For me, that makes it very attractive for a startup or small business that may want to add a support contract later. Ubuntu makes it a lot easier than Red Hat. Paid support for Debian is via third parties. Ubuntu is a solid distro, although I think Debian is a better one if paid support isn't an important feature to have.

For some reason I had feeling that Ubuntu more "serious" than Debian. I mean they're asking for money from people. So it's basically Debian with paid services. Can't be worse than Debian and probably is better, maybe they paid some engineer with these money to patch things faster.

That's just some rough reasoning in my head.

Also when you install third-party software, 100% of them will support Ubuntu. That's more about workstation usage, though. But having tested platform matters.

For me, it's not so much "what does Ubuntu have that Debian doesn't" and more that "just use Ubuntu" has only bitten me twice.

It's 2009 or so and I want to try Linux. "Just try Ubuntu" they say, and I have a good time. I see that many "How to use X on Linux" guides, or FOSS software, often build for only Debian, and sometimes only Ubuntu. This is fine until snaps give me huge problems in 2018, and so I completely stop using Ubuntu desktop.

Now in 2026, I manage three servers (two on Ubuntu), one Raspberry Pi (on Ubuntu), and two Linux desktop installations. I stopped using Ubuntu desktop in 2018 but snaps are less problematic for my server workflows, so now I have three Ubuntu server installs. On my desktops and my one non-Ubuntu server, I find myself sometimes missing Ubuntuland. (These aren't Debian though, so I might just be missing Debianland.)

"Just use Ubuntu" is now something that has bitten me in using servers. Two bites in 17 years is a fantastic track record. But this slow response to a CVE fix has me looking at Debian, and this has shaken my faith in canonical. "Do they pull in upstream security fixes quickly" is one of my first questions for any FOSS I use.

But my servers aren't Nix or IaC or whatever, and so... Taking them down and putting them up would take a lot of time and risk, which are two things I'm not so willing to spend. Maybe it's 10 minutes, or maybe there's a bandaid fix I have from 2023 that I forgot about and would need an hour to re-derive. So, I find myself taking the security gamble instead.

Ubuntu has a timeline for how long they will provide updates for a given long term distribution release. I moved over to Ubuntu back when CentOS was converted in to a Fedora type release without a long term commitment to providing security fixes.

I might be moving over to Rocky Linux 10.

Historically, Debian didn't ship proprietary wireless firmware in the installer (because it was proprietary software, and Debian doesn't do proprietary), so you couldn't install it on most laptops without plugging them into wired Ethernet to download the wireless firmware packages from non-free.

They changed that a few years ago, but plausibly the underlying prioritization of end-user experience is still lower than Ubuntu's degree of user focus.

I still wish Mark would rename his company "Ubuntu". He's a great guy, the company does great work, but I keep getting undeserved credit for it because we wouldn't sell him the domain name.

[for clarity, I am not talking about servers]

When a non-technical person asks me “which Linux?” I recommend Ubuntu because it is about as gentle an experience as Linux is going to be. The install is friendly and the culture is less RTFM than anything else.

Those are the same reasons I run Ubuntu on my laptops that aren’t running Windows…I prefer low friction to arguable technical superiority. I’ve looked at other distros in the past and decided they weren’t worth the bother…To Me.

But that’s me, not you or anyone else. And my use case not yours or someone else’s.

I'm not a Linux user, but occasionally self-host some stuff. One time I tried Debian instead of Ubuntu, it was a lot of "this is not installed" & "this is not set up" errors during setup process of software I wanted. In the end I succeeded in doing what I wanted, but I also wasted time on doing things I never have to do when using Ubuntu.

Debian by default has had ancient versions of stuff, and if you want third party software, Ubuntu has more mindshare so it was more likely to be tested - anything from graphics card drivers to Steam games.

If your infrastructure doesn't use landscape, kernel hot patching, JuJu or similar Canonical technology, or doesn't have its own Snap storefront, there's no need to install Ubuntu. Rest is just momentum.

Debian used to move a bit slow in terms of userspace, and that's true, but for servers, that's a non-issue for the last 20 years or so (from my experience).

On the Desktop side, Fedora and Ubuntu moves faster on the userspace front, but if your system is behind a NAT, and you know what you're doing, Debian Testing is just as good, more stable and it's rolling (except when it's feature freeze, but a stable workhorse is better than a shiny but breaking one).

Debian allows me to sleep well at night, provides guaranteed updates, and works rock solid all-round, so I won't be touching Ubuntu for the foreseeable future. Esp, with controversial choices like uutils, etc.

[delayed]

They probably don't know Mint was based on Kubuntu. Or that they all - like DSL, Knoppix and others are all based on Debian and if you're brave, you can pivot to Sid from each of them.

When I worked at Canonical, the funnel I observed was Gamer Culture and the Chronically Online. They don't know from Debian.

Debian doesn't have any of the Ubuntu Pro features, e. g. Kernel live patching.

I find major version upgrades a lot more reliable on Ubuntu. Every time I've done that on Debian something big broke.

Proprietary drivers, desktop first experience similar to how Mandrake used to be, or SuSE, and the most relevant, in regards to proprietary software on Linux distributions, it tends to be either Ubuntu or Red-Hat.

FIPS mode? It's a pretty niche requirement, but I was under the impression that options are somewhat limited for FIPS-compliant crypto (both disk and networking)?

At my company, it’s the pateena of “enterprise”. I came to th company with strong open source bias. The more traditional/conservative IT guys were all about Microsoft and RedHat. When I lobbied hard for some Debian assets, Canonical was the compromise. But I think we’re real close now to seeing the next round of allocations be straight Debian.

Ubuntu did what Debian failed at. Better LTS, More features including drivers, available by default by most providers, lot more branding/documentation and in the early days, easier distribution. I am old enough to remember distro like SuSe Linux etc and when Ubuntu came on scene, it became the de facto.

All my servers were debian until I brought some Raspberry Pi 5 boards. Debian still does not have tested images for them today.

> What is Ubuntu offering that Debian doesn't provide?

I'm on an nvidia jetson which comes out of the box with Ubuntu pre-installed (it's slightly more complicated but that's the gist). You can run other OSes but it is a messy experience and you can easily run into problems.

Yes, it is shitty from nvidia that they do it this way. But it is also convenient.

Debian's ancient packages and kernel.

Just that it’s already installed, and I haven’t tried a new distro in over a decade.

But 15-20 years ago it was easier to install the nonfree stuff on ubuntu, like drivers and DVD playback and stuff. I don’t know if its still like that.

I never understood ubuntu as a server over debian, but for a desktop it was a nicer experience for a while.

They test run a little more tests on their backports (and have the manpower to actually look into what is failing) and they have really far out EoL once the kernel release is selected at fixed intervals. So if you managed to get the capabilities that you care about in their tests, there is a low probability that applying updates will cause some catastrophic outage or data loss over the next 10 years. Which can be improved further by fine-tuning phased update rollouts.

Unfortunately, they did in recent history manage to still break iptables, zfs, nilfs and a bunch of machines with weird (arguably broken) firmware anyway, so my personal comparison between Debian (or simply directly the Kroah-Hartman/Levin stable upstream) and the Ubuntu backports is not exactly in favor of Ubuntu.

Software, such as AMD Vivado, tends to support Ubuntu more than Debian by testing against Ubuntu only. Nvidia's Jetson stack supports Ubuntu.

Enterprise support contracts for Linux and the compliance legal liability. No large commercial companies would run purely contributor supported systems because of the lack of those two things.

Please suggest a better alternative for a cloud server? (Genuine question, where do I move?)

Consumer-centric customizations and non-free package options. It’s somewhat akin to answering “How can I add stuff like OneDrive to Linux and not have to configure/self-host everything?”

I used to like Ubuntu and Canonical products and these days I’m more indifferent towards them. Their products have a place, but I wish Canonical would stop killing off some of the more interesting side projects.

It's the default for my VPS provider

I used Debian on my machines (after I got past their ideological view on drivers and found I could get them separately and made it work) ... until a patch came out and WiFi was broken on my machines. I went back to Ubuntu, have not had issues like that. Ubuntu works reliably, from my experience, on real world machines.

For desktop use, new-ish user-facing packages without any hoops (such as backports) jumped. Especially where collaboration is involved it can be a major issue when a program lags behind its commercial OS counterparts by several months or years in terms of features and behavior.

I don’t use Ubuntu but use Fedora (and its derivatives) partially for that reason.

Desktop Ubuntu purely because of the drivers. Normally used Debian for my own servers, but haven't done that in so long, and Ubuntu is often default on cloud providers so yeah.

It’s the default offered by most cloud providers, so in some sense it’s pure inertia.

I really don’t care what I run on, as long as it’s some flavour of Linux, it works reliably, and it’s secure.

For me, habit. A habit I'm getting tempted to break by exactly the grumble in this post. This has been an awful ~two weeks for maintaining infrastructure and the ubuntu lag on this specific issue is contributing to the awfulness.

Their kernel is vastly superior when dealing with buggy enterprise hardware.

It's the default that a bunch of vendors package. For example, Nvidia's official CUDA images used to only be provided for Ubuntu (they have since expanded their offerings somewhat)

Suppose you are an enterprise paying large amount of money to NVidia to buy their AI hardware to run AI workloads locally. Are you going to say we will refuse the default OS (https://docs.nvidia.com/dgx/dgx-os-7-user-guide/introduction...) on such hardware and lose hardware support, or are you going to stick with the supported OS for your hardware?

Enterprises care far more about vendor support than the typical Linux hacker at home.

Paid support. Doesn't look like it's worth it, though.

ZFS.

Inertia, I'm guessing. I have a couple of older on-prem servers still on Ubuntu LTS. Newer ones are on Debian stable.

AFAIK with Debian you remain on older versions of packages (unless you are on Debian testing).

ROS, which is not officially supported on Debian. Not using it myself, but users here do use it.

I have a company laptop that came with Ubuntu from the factory, Debian wasn’t an option.

More recent packages

How is the gaming experience on Debian? I'm genuinely asking, not a snark.

I use desktop Ubuntu because it's up to date and it just works for me, and I can play the latest games in it with Steam + Proton. I don't have to tweak it or do any additional downloading of stuff besides the Nvidia drivers (I actually don't remember how I installed them).

Can I do this with Debian, in a no fuss way? (I know this can be done in any distro, that's why I'm stressing "no fuss").

1. Faster and predictable release cadence. New releases every six months, April and October (hence x.04 and x.10). New LTS releases every April on even years (26.04, 28.04, 30.04, etc).

2. The LTS releases are supported by Canonical for at least five years on the free tier, and up to fifteen years with paid support contracts.

I would need to reinstall OS on my laptop and deal with all time-consuming migration stuff for everything that changed and to configure Debian where it is doing weird things

> What is Ubuntu offering that Debian doesn't provide?

I have it right now at zero additional effort

Speaking as somebody who stayed on it way too long (until 10 years ago, maybe) it was because people constantly told me scare stories about how difficult it was to configure into something usable.

I had to go through the torturous path of Ubuntu -> Mint -> Mint Debian -> Debian. The last step was after I used a Debian live disk to do something and I could see that the stories were nonsense; just something that had adhered to the word Debian in my mind through repetition.

The two worst parts about it were 1) that I had long left Ubuntu on servers and had been using Debian there for years - I was just afraid of the desktop for some reason, and 2) that if I had just listened 15-20 years ago when people told me that FrankenDebians were nothing but problems, I would have never been caught in the net.

I've never been a fan of Ubuntu's business practices, but I'm just generally not into Debian derivatives anymore. If I were to leave Debian, it would be for an entirely different (and philosophically different) distro. I probably make an exception for Devuan, because it's only trying to change one thing (that I think of as the biggest threat to Linux, the final boss evil spawn of RedHat.) Devuan is an escape hatch for when the rugpull happens.

I use it as default for WSL2, because it's a default

Mostly:

1. Hardware generally just works

2. Videos that use patented formats just play without fiddling

3. Proprietary closed-source software, if they even support Linux, usually releases Ubuntu binaries before anything else

It's just the default target. For backend stuff, you're right that there's really very little true value. But client software just has a lot of complexity. If you run binaries from wherever, they're probably built and tested on Ubuntu first. Like, your vendors won't support distros officially, install scripts and AppImage integrations are going to tend to assume stuff. Driver/runtime integration for things like binary GPU stacks are going to document Ubuntu first. If someone makes an assumption about Python version (a personal peeve -- LOTS of python software ends up lagging the tip, it's not a super compatible ecosystem), it's going to be that you're running Ubuntu LTS version "one before latest", etc...

Are those fatal flaws? No. But lots of people just don't want to deal with it. And there's a market for that.

Because every where you used to go on the internet you read that debian is “slow” on updates but stable as a trade off, if you are after certain new packages you have to use Ubuntu, also, some use cases (say jetson boards) have ubuntu by default plus nvidia drivers.

They have more kernels, more support for modern hardware etc... good luck running Debian on a modern laptop.

Ubuntu kernels are not the one that Debian uses. The latest stable Debian is based on a 2 years old Kernel ( 6.12 ).

much newer software, kernel, default setup is much more user friendly

Ubuntu is the gateway drug to Debian, in a lot of ways. You get used to GNU/Linux with Ubuntu, then you find out that there are more refined options and go for those, and a not-insignificant part of that crowd likely goes to Debian because of how familiar it is.

Back when I used Ubuntu it was because I was tired of being excited about a new feature and not getting to use it until it made its way to Debian 5 years later.

"Ubuntu" is an ancient Swahili word meaning "I can't install Debian".

Increased safety with Rust utilities. /s

"Ubuntu" is an ancient African word meaning "I can't configure Debian."

On the desktop, Debian is pretty weak.

If you had to manage what has become critical infrastructure around the globe using something like Launchpad, you'd understand.

It's not optional.

I think the official CTF is up here:

https://ubuntu.com/security

server: nginx/1.14.0 (Ubuntu)

If someone does a v2 let's hope they make sure it's actually exploitable when they set it up so they don't leave hundreds of people with the assumption that the cve is not a big deal when the CTF was just misconfigured and the system got pwned in less than 2 hrs after they fixed it

CVSS in general is not the best proxy for "real world impact". You could have a 10 on a software thats only deployed once and the impact would be tiny. In this case, multipath is not used that much (except by go).

Contrast this with: "The Gift of It's Your Problem Now"

We keep doing this to ourselves. Heads should roll at Ubuntu. Start that process right now? You can't. You see, nobody is directly available to sue. It does seem that nobody ever truly cared about that. The insecure codebase and tech debt shall continue to grow because that is the gift.

https://apenwarr.ca/log/20211229-the-gift-of-its-your-proble...

I think it's less of a concern over the internet because the kind of packet necessary for the exploit tends to be filtered out, but it's pretty scary as an escalation mechanism from e.g. an end-user device to a core server.

Much like with PHP2Shell, it doesn't need to be utterly trivially exploitable to be a big concern.

Your comment should be higher. Most indignant comments here are variants of "Tell me you don't know about CVE triage and Linux kernel releases without telling me you don't know about them". I mean, I also don't know a lot about them, but Canonical's security record has been exemplary in my experience, and I see no solid reason to doubt their process in this instance.

First, if this CVE did truly put every Ubuntu machine on the Internet at risk, we'd know about mass compromises by now, and there haven't been any reports. It means the CVE is not trivially exploited.

Second, the gravity of the CVE dictates the security release cycle. Emergency kernel patches carry risks of their own, and it would be worse to hurry a non-critical patch and crash a part of their massive user base.

> The post gives no details about what this vulnerability is, how critical it is, how it is impacting them personally, how vulnerable their servers are, how they are working around it.

Yes it does? And Ubuntu is selling security subscriptions and doing a poor job of it, These aren't open source volunteers, this is a paid product.

But Ubuntu is not some small distro maintained by unpaid volunteers; they are a corporation that offers paid support. I think it reasonable to be disconcerted when a company that you are paying for security updates is this negligent, especially when other distros have fixed this issue far more expediently.

The post is making 0 demands, they're made a valid statement and moving off Ubuntu.

> This “I demand to speak to the manager” energy should be kept out of open source.

This. You are welcome to publish patches and demonstrate how people can fix their own machines out of band with what Ubuntu does. This costs you... 10 minutes with AI help?

While it's easier than ever to complain this year, I'm patching all the things while on a walk or not at my computer, it's great!

Welcome to the world of tomorrow

But Ubuntu is not the embodiment of "open source". It's a business. With managers...

>The post gives no details about what this vulnerability is, how critical it is

what? the literal first paragraph says:

"In case you missed it: CVE-2026-98432 is a critical (CVSS 9.8) bug in the Linux kernel's TCP code. It's been there since 2016, so virtually every Linux server on the planet has it, and it can be hit remotely"

Yeah that literally is in "does not compute" territory for me. That page literally opens with "Ubuntu priority High [..] 9.8 · Critical [..] Publication date 15 October 2026 [..] Last updated 30 October 2026" which is exactly why "WTF Ubuntu" is the right response here.

> Rocky Linux 10

Does Rocky use their own community-built packages, or does it use RHEL's?

Because I don't think Red Hat have released patches yet either?

14.04 LTS trusty is not vulnerable fyi.

maybe they also use 8 stages and several months for their security fix process. Just to be sure... ;)

maybe this was the plan all along.

I think they shipped patches yesterday. Which is still a long wait.

https://access.redhat.com/security/cve/cve-2026-98432

Because that doesn't allow for sensationalizing the frustration.

Because you shouldn't have to do mitigations for this level of severity while waiting weeks for OS patch. I did that, but now I'm waiting for patch to unwind my mitigations.

Talking of which, is there a link to the temporary fix?

I have one Ubuntu Pro server and it has not received the fix yet. Fedora would have been preferable but that is "not supported" and I had to have Ubuntu.

I think this is the important question. To everyone who is complaining while using Ubuntu for free: People whose software you use for free don't owe you anything.

Nope

After painful Ubuntu upgrades in the past, I moved to Alma Linux and have been very happy. It takes a small adjustment to dnf instead of apt, but realistically I was over that hump in 30 to 60 minutes and this was before AI. With AI to translate and test install scripts and the like, it might be a 5 minute task depending on how much automation you already have in place. Though even an entirely un-automated setup that is just a README.md, claude wrote me an Alma Linux version of a very ubuntu specific project that gave instructions for Alma instead of Ubuntu, and it worked almost perfectly first time and AI was able to (with prompting) see the issue and quickly found a workaround. We're a small org, but at some point when we hit scale and have compliance requirements, a migration to RHEL is also largely trivial if/when the time comes.

Good question... I run ubuntu on servers because the LTS has clear 5 years of security fix.

I use arch linux for my NAS because it's fun and I don't care if it occasionally goes down but I wouldn't use it for production (on my NAS it's mostly stable but has gone down a few times)

So what's next? Centos is a rolling upgrade, nixos?

As always, it depends on how and what you're managing on it.

VPS/VM? Debian is a great choice. Use it as base and run your software via systemd+podman if you want the most up to date stuff, Debian tends do lag a bit. It is very low maintenance.

Bare metal? Fedora Atomic is awesome. It does require an update every other week since it keeps packages closer to upstreams, but this is where the immutable base shines, any issue is an easy reboot to revert. Also systemd+podman for your own software.

I wouldn't recommend Arch on servers.

Edit: clarified Fedora immutable spins are called Fedora Atomic.

Debian stable of course.

I don't like ads, and I didn't like logging into SSH and seeing a nag to update to Ubuntu Pro because I had the balls to keep running 20.04 in 2023. I've seen this before on previous releases (and know how to remove the message), but seeing it again was the straw the broke the camel's back.

> Why anyone would prefer Ubuntu over Debian, which is a purer, higher quality, more mature distro, is beyond me.

For me, I view Ubuntu as the "higher quality, more mature distro" which I value over "purity".

People are paying money for Ubuntu, though. I suppose if only the free versions were unpatched we could consider the ethics and merits of who is allowed to complain about what, but when the paying customers are also being left out in the cold I don't think your argument has much merit.

Ubuntu is a for profit product by a commercial company, Canonical.

Yes, NixOS has already patched this.

NixOS also makes it much easier than ubuntu to install your own patches and version of the linux kernel.

For example, assuming NixOS had not yet released the fixed linux version, 6.18.56 (though it has), you could upgrade to it before NixOS did it upstream with this one line:

    boot.kernelPackages = pkgs.linuxPackagesFor (pkgs.linux_6_18.override {argsOverride = {src = pkgs.fetchurl {url = "mirror://kernel/linux/kernel/v6.x/linux-6.18.56.tar.xz"; }; version = "6.18.56"; modDirVersion = "6.18.56";};});

You could add the patch yourself if you needed to with:

    boot.kernelPatches = [{ patch = ./cve-patch.patch; }];

And then you'd be updated.

The debian and redhat based distros all make it so configuring what packages are installed ('apt install' / 'yum install') is a different operation from configuring the packages themselves.

On NixOS, the specification of how to build a package, what package is installed, patches, etc are all in the same language, and so it's a lot more natural to patch things as needed.

And also, LLMs are pretty good at generating working nix, so you can have an agent apply patches to your kernel package with NixOS quite easily. Agents can also do this for ubuntu or redhat, but in my experience they're much worse at it, and it's harder to undo mistakes if they mess up.

Substantially worse in my experience. They build the whole OS in CI which is slow and unreliable, and as a result it can take 2+ days for updates that other distros have out in under an hour. You can try mix packages from smash or unstable builds but for stuff like kernels that’s not simple.

I keep Snap disabled on my systems:

cat /etc/apt/preferences.d/nosnap.pref

Package: snapd Pin: release a=* Pin-Priority: -10

All other Linux distros have the same gpu drivers.

And you can have an ubuntu userland setup and any package necessary to run cuda in mere seconds on any linux distro thanks to toolbox and distrobox.

It’s been nearly two weeks, a bit more than “a few days”

Don't expect closed source to protect you. LLMs are very happy to analyse binaries and decompile functions you need. It's barely harder to deal with software you don't have the source for. I did both security and reveng work with LLMs and they don't slow down.

It's really not that easy - for a human - to write a weaponized exploit for a bug like that one.

I'm not too surprised, it feels more like a way to help promote Anthropic than what it tries to appear to be.

That is with the implicit assumption that the mptcp exploit of this ipv4 tcp bug is the only exploit that will be found. I don't think that assumption will hold true.

Slackware is a cool distribution. I really love that it's maintained by Patrick and I enjoy the simplicity and the stubbornness of it's opinionated decisions.

I stopped using it back in 2004 when Patrick had health problems. It seems to be a passion project and it stopped getting updates while he recovered. There is a community behind it but it may mainly be driven forward by him.

It looks like it's fairly slow to get updates, generally, as the last release was Slackware 15 in 2022. Maybe that reflects it's dictator (his word not mine) or maybe it reflects it's stability.

Yet, despite all that, Slackware got this security fix around 10 days ago.

Arch patched the vulnerability, yes. Dotfiles don't change that.

<animation of DHH in a race car driving bits and bytes to Linux machines>

or maybe, just maybe, entertain for a second that upstream (linux kernel) shipped the original patch commit on October 1st with rollout to mainline on October 9th and disclosure on October 15th.

People with affected systems have been waiting ever since for canonical to ship ... something, anything. Or maybe communicate the blockers. Crickets, though.

It gets all the more egregious if you're a paying customer for Ubuntu Pro (which thank god, our company is not).

It is absolutely taking the proberbial piss when you put it into context of their bold shiny new ambitions posted on September 23rd on their official blog (https://canonical.com/blog/accelerating-delivery-of-cve-fixe...) ... failing every single listed requirement in that announcement, now 14+ days, after initial CVE disclosure.

No need for a tin-foil hat here at all. Ubuntu has a large installbase. Part of which hosts servers. And if I had to take a wild guess that userbase is about to shrink dramatically going forward.

Go programs listening on TCP have multipath enabled.

Having to get the client into call just so they go and click authorisation for adding some signing keys on VMs (as it was in pre-boot stage) just to add some driver wasn't fun

What an awful system

Probably Debian.

Meanwhile, Debian lol

"If you're not paying, you're the product-" hey jerks, the analogy doesn't always work

The obvious difference is that version N-1 has a known vulnerability that could potentially be exploited, and everyone now knows about it.

This doesn't work in practice. That's not really how OSS works; it's a naive interpretation. I can go into details if you'd like, but first: Have you taken this approach before? What were the results? I find it usually ends up in discussions/arguments with the owners, and it doesn't get merged. And I see the other side too; reviewing PRs is a burden, and the submitters often will fix their own problem, while introducing complexity or problems elsewhere. Also, it's generally MUCH easier for a maintainer/owner to update software than a rando who wants a bug fixed.

> "The free operating system that I use is not giving me enterprise level security updates"

Canonical absolutely is marketing enterprise security updates (at least for those who pay). I don't see this in the paid ESM updates channel yet either?

Their main point is that Canonical do in fact charge for security updates (they charge some companies for support), and yet are not providing them.

From the article:

> Oh and btw, distros run by volunteers (Debian, Arch, Alpine...) hve shipped the fix. Meanwhile Ubuntu, made by a company that sells security subscriptions, hasn't. This is true as of 2026-11-02 14:48 UTC.

Ubuntu is one of the larger companies in the OS space and advertises themselves as providing long term support with rapid security fixes. AFAIK they haven't released a fix for their paying customers either. If they were complaning about arch or debian then I think you would have a strong point, when those distros have fast fixes but ubuntu doesn't I'm not so sure they that criticism of ubuntu is unwarranted.

(Also, ubuntu already has the fix. What they're dragging their feet on is releasing the updated version. I don't think anyone outside ubuntu can help with that process)

Getting commit rights for kernel to "just fix the issue" in a corporate led dev project.

Let's see you do it.

Two weeks late is hardly “enterprise level”

If they don’t have the resources to handle this, they should be recruiting more help from their community

The code that fixes the issue has already been published: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...

Just not picked up by this distribution which advertises itself as having “Enterprise-grade support and integration”. https://ubuntu.com/desktop#:~:text=Enterprise%2Dgrade%20supp...

> The free operating system

Ubuntu Pro is $500 per machine for enterprise.

The most famous not-free-as-in-beer OS that specifically marks enterprise as their target market actually only fixed this yesterday... whatever you may want to take from that.

Ubuntu is not a small open source project ran by maintainers, Canonical is a full fledged b2b company with 600+ employees.

Canonical ltd is a multinational tech company with hundreds of millions of dollars in revenue from enterprise contracts

No updates for paying users of Ubuntu Pro either