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AlmaLinux 10.1 has been released. In addition to providing binary compatibility with Red Hat Enterprise Linux (RHEL) 10.1, the most notable feature in AlmaLinux 10.1 is the addition of support for Btrfs, which is not available in RHEL:

Btrfs support encompasses both kernel and userspace enablement, and it is now possible to install AlmaLinux OS on a Btrfs filesystem from the very beginning. Initial enablement was scoped to the installer and storage management stack, and broader support within the AlmaLinux software collection for Btrfs features is forthcoming.

In addition to Btrfs support, AlmaLinux OS 10.1 includes numerous other improvements to serve our community. We have continued to extend hardware support both by adding drivers and by adding a secondary version of AlmaLinux OS and EPEL to extend support of x86_64_v2 processors.

See the release notes for a full list of changes.

It is rarely newsworthy when a project or package picks up a new dependency. However, changes in a core tool like Debian's Advanced Package Tool (APT) can have far-reaching effects. For example, Julian Andres Klode's declaration that APT would require Rust in May 2026 means that a few of Debian's unofficial ports must either acquire a working Rust toolchain or depend on an old version of APT. This has raised several questions within the project, particularly about the ability of a single maintainer to make changes that have widespread impact.

Greg Kroah-Hartman has announced the release of the 6.17.9, 6.12.59, and 6.6.117 stable kernels. As usual, he advises users of stable kernels to upgrade.

Security updates have been issued by Fedora (calibre, chromium, cri-o1.32, cri-o1.33, cri-o1.34, dotnet10.0, dovecot, gnutls, gopass, gopass-hibp, gopass-jsonapi, kubernetes1.31, kubernetes1.32, kubernetes1.33, kubernetes1.34, and linux-firmware), Mageia (ffmpeg, kernel, kmod-xtables-addons & kmod-virtualbox, kernel-linus, konsole, and redis), Red Hat (bind and bind-dyndb-ldap and kernel), SUSE (act, alloy, amazon-ssm-agent, ansible-12, ansible-core, blender, chromium, cups-filters, curl, elfutils, expat, firefox, glib2, grub2, helm, kernel, libipa_hbac-devel, libxslt, nvidia-container-toolkit, ongres-scram, openexr, podman, poppler, runc, samba, sssd, thunderbird, and tomcat), and Ubuntu (cups-filters, linux, linux-aws, linux-gcp, linux-hwe-6.14, linux-oracle, linux-realtime, linux-oem-6.14, and linux-realtime-6.14).

Linus has released 6.18-rc7, probably the last -rc before the 6.18 release.

So the rc6 kernel wasn't great: we had a last-minute core VM regression that caused people problems.

That's not a great thing late in the release cycle like that, but it was a fairly trivial fix, and the cause wasn't some horrid bug, just a latent gotcha that happened to then bite a late VM fix. So while not great, it also doesn't make me worry about the state of 6.18. We're still on track for a final release next weekend unless some big new problem rears its ugly head.

The Racket programming language project has released Racket version 9.0. Racket is a descendant of Scheme, so it is part of the Lisp family of languages. The headline feature in the release is parallel threads, which adds to the concurrency tools in the language: "While Racket has had green threads for some time, and supports parallelism via futures and places, we feel parallel threads is a major addition." Other new features include the black-box wrapper to prevent the compiler from optimizing calculations away, the decompile-linklet function to map linklets back to an s-expression, the addition of Weibull distributions to the math library, and more.

The Oracle blog has a lengthy article on enhancements to GCC to help detect overflows of flexible array members (FAMs) in C programs.

We describe here two new GNU extensions which specify size information for FAMs. These are a new attribute, "counted_by" and a new builtin function, "__builtin_counted_by_ref". Both extensions can be used in GNU C applications to specify size information for FAMs, improving the buffer overflow detection for FAMs in general.

This work has been covered on LWN as well.

The call for candidates for the 2025 election for the Linux Foundation Technical Advisory Board has been posted.

The TAB exists to provide advice from the kernel community to the Linux Foundation and holds a seat on the LF's board of directors; it also serves to facilitate interactions both within the community and with outside entities. Over the last year, the TAB has overseen the organization of the Linux Plumbers Conference, advised on the setup of the kernel CVE numbering authority, worked behind the scenes to help resolve a number of contentious community discussions, worked with the Linux Foundation on community conference planning, and more.

Nominations close on December 13.

Unpacking Python iterables of various sorts, such as dictionaries or lists, is useful in a number of contexts, including for function arguments, but there has long been a call for extending that capability to comprehensions. PEP 798 ("Unpacking in Comprehensions") was first proposed in June 2025 to fill that gap. In early November, the steering council accepted the PEP, which means that the feature will be coming to Python 3.15 in October 2026. It may be something of a niche feature, but it is an inconsistency that has been apparent for a while—to the point that some Python programmers assume that it is already present in the language.

Version 8.5.0 of the PHP language has been released. Changes include a new "|>" operator that, for some reason, makes these two lines equivalent:

    $result = strlen("Hello world");
    $result = "Hello world" |> strlen(...);

Other changes include a new function attribute, "#[\NoDiscard]" to indicate that the return value should be used, attributes on constants, and more; see the migration guide for details.

Security updates have been issued by AlmaLinux (delve and golang), Debian (webkit2gtk), Oracle (expat and thunderbird), Red Hat (kernel), Slackware (openvpn), SUSE (chromium, grub2, and kernel), and Ubuntu (cups-filters, imagemagick, and libcupsfilters).

In July, Collabora announced the Rust-based Tyr GPU driver for Arm Mali GPUs. Daniel Almeida has posted an update on progress with a prototype of the driver running on a Rock 5B board with the Rockchip RK3588 system-on-chip:

The Tyr prototype has progressed from basic GPU job execution to running GNOME, Weston, and full-screen 3D games like SuperTuxKart, demonstrating a functional, high-performance Rust driver that matches C-driver performance and paves the way for eventual upstream integration! [...]

Tyr is not ready to be used as a daily-driver, and it will still take time to replicate this upstream, although it is now clear that we will surely get there. And as a mere prototype, it has a lot of shortcuts that we would not have in an upstream version, even though it can run on top of an unmodified (i.e., upstream) version of Mesa.

That said, this prototype can serve as an experimental driver and as a testbed for all the Rust abstraction work taking place upstream. It will let us experiment with different design decisions and gather data on what truly contributes to the project's objective.

There is also a video on YouTube of the prototype in action.

BPF allows programs uploaded from user space to be run, safely, within the kernel. The io_uring subsystem, too, can be thought of as a way of loading programs in the kernel, though the programs in question are mostly a sequence of I/O-related system calls. It has sometimes seemed inevitable that io_uring would, like many other parts of the kernel, gain BPF capabilities as a way of providing more flexibility to user space. That has not yet happened, but there are currently two patch sets under consideration that take different approaches to the problem.

Security updates have been issued by AlmaLinux (bind, bind9.18, container-tools:rhel8, expat, grub2, haproxy, idm:DL1, kernel, kernel-rt, lasso, libsoup, libssh, libtiff, pcs, podman, python-kdcproxy, qt5-qt3d, redis, redis:7, runc, shadow-utils, sqlite, squid, vim, webkit2gtk3, xorg-x11-server, xorg-x11-server-Xwayland, and zziplib), Debian (chromium), Oracle (lasso and postgresql), SUSE (erlang27, ghostscript, grub2, kernel, libIex-3_4-33, python312, and sbctl), and Ubuntu (linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4, linux-xilinx-zynqmp, linux-aws-6.8, linux-fips, linux-aws-fips, linux-gcp-fips, linux-oracle, and mysql-8.0, mysql-8.4).

Inside this week's LWN.net Weekly Edition:

• Front: Hardware architectures; Fedora Flatpaks; Debian hardware support; sockaddr structure; NUMA nodes; Homebrew.
• Briefs: LightDM security; Debian Libre Live; Xubuntu postmortem; Blender 5.0; Git 2.52.0; Rust in Android; Thunderbird 145; Quotes; ...
• Announcements: Newsletters, conferences, security updates, patches, and more.