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MeshCore is a relatively new project, started in January 2025, that aims to build a scalable mesh network using low-power long-distance radios. While many other projects of the same general nature have been tried before, MeshCore grew quickly because of its more efficient message routing and enthusiastic community. In early 2026, an early proponent of the project made a sudden shift that left the rest of the community stunned and embroiled in a trademark dispute.

Many organizations require US Federal Information Processing Standard (FIPS) certification of the crypto code they are running. The certification process is lengthy, but the bigger problem is that the way the crypto subsystem is built into the kernel makes the result unable to be reused across kernel updates. I have proposed a patch series that decouples the crypto subsystem into a standalone loadable module, allowing a certified crypto module to be reused with multiple kernels and, thus, requiring fewer lengthy recertification delays.

Andrew Nesbitt has written a blog post detailing a recent incident with the jqwik library for property-based testing in Java. On May 25, the 1.10.0 release of jqwik included a change that attempts to instruct coding agents to disregard previous instructions and delete jqwik tests and code.

I think this is a new class of supply-chain input worth keeping an eye on, mostly because of how little of the existing tooling has any opinion about it. A System.out.print of sixty-eight bytes of plain ASCII isn't the kind of thing scanners are looking for, since those watch for install hooks, network calls, filesystem writes, obfuscated strings and the like. The jar makes the same syscalls it made in 1.9, and because the change was committed and released by the legitimate maintainer through the normal build, it's clean from a SLSA point of view too: the provenance is what it should be. Anyone who reads the diff can see what it does, but a patch bump of a test-scoped dependency is not where most projects spend their review time.

Security updates have been issued by AlmaLinux (.NET 8.0, .NET 9.0, cockpit, firefox, flatpak, httpd, kernel, and kernel-rt), Debian (kernel, kitty, lemonldap-ng, nagios4, python-flask-httpauth, and roundcube), Fedora (CImg, gmic, haveged, jpegxl, kernel, libpng, mapserver, mingw-qt6-qtsvg, openbao, perl-Sereal, perl-Sereal-Decoder, perl-Sereal-Encoder, and podofo), Mageia (bind, graphicsmagick, microcode, nginx, packages, perl-Catalyst-Plugin-Authentication, perl-HTTP-Daemon, perl-IO-Compress, and thunderbird(-l10n)), SUSE (alloy, apache2, beets, bubblewrap, cups, docker-stable, ffmpeg-4, ffmpeg-7, firefox, google-osconfig-agent, patterns-glibc-hwcaps, podman, samba, thunderbird, trivy, xdg-desktop-portal, and xz), and Ubuntu (apache2, libreoffice, multipart, openjdk-17, openjdk-17-crac, openjdk-21, openjdk-21-crac, openjdk-25, openjdk-25-crac, openjdk-26, openjdk-8, openjdk-lts, php8.1, php8.3, php8.4, php8.5, pyopenssl, python-pip, qtsvg-opensource-src, sed, and vim).

Version 1.96.0 of the Rust programming language has been released. Changes include a new set of Copy-implementing Range types, assertions with pattern matching, a number of stabilized APIs, and two Cargo vulnerability fixes.

Gentoo developer Michał Górny has written a lengthy article explaining the philosophy and purpose of the Gentoo Linux distribution, in response to a thread on Mastodon:

Gentoo is a source-first distribution, which means the primary method of installing software is to build it from source. Of course, that doesn't mean manually building stuff, following some kind of how-to: finding all the dependencies, installing them manually, going through a series of magical incantations, and eventually ending up no better than if we were installing a binary package. The package manager takes care of all the necessary steps and more, making package installs easy; well, at least unless something fails. But I'm digressing...

[...] We try to build a friendly and welcoming community around Gentoo, and we truly want using Gentoo be an enjoyable experience. We want it to be a system that doesn't betray you.

In a filesystem-track session at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, Amir Goldstein wanted to discuss his proposed documentation on adding new filesystems to the kernel. There are a number of unmaintained and untestable filesystems already in the kernel, which are a burden to VFS-layer developers who are trying to make sweeping changes, such as switching to folios and the "new" mount API. Goldstein's document is an attempt to head off the addition of filesystems that may increase that burden down the road.

IBM has sent out a press release touting a claimed $5 billion investment into an operation called Project Lightwell:

Project Lightwell will establish a trusted enterprise clearinghouse combined with a global force of engineers to identify and fix vulnerabilities at scale. The clearinghouse will serve as a security coordination layer, using advanced AI capabilities to validate and test fixes across an unprecedented volume of open source code. These capabilities will be offered through commercial subscriptions, allowing enterprises to integrate secure patches directly into their existing software supply chains with enterprise-grade validation and lifecycle management.

Toward the bottom, it does also mention sharing vulnerability information with upstream projects.

The kernel's memory-management subsystem is currently partway through a multi-year project to replace the page structure (which represents a page of physical memory) with memory descriptors. At the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, Vishal Moola ran a fast-paced session in the memory-management track to describe the current state of that work and what is likely to happen next.

Security updates have been issued by AlmaLinux (firefox, gdk-pixbuf2, glibc, gnutls, kernel, libexif, mysql8.4, postgresql16, postgresql18, python3.14, ruby:3.3, and ruby:4.0), Debian (krb5, roundcube, starlette, unbound, and varnish), Fedora (kernel, nginx, nginx-mod-brotli, nginx-mod-fancyindex, nginx-mod-headers-more, nginx-mod-js-challenge, nginx-mod-modsecurity, nginx-mod-naxsi, nginx-mod-vts, perl-Imager, poppler, python-uv-build, rrdtool, rust-astral-tokio-tar, rust-astral_async_http_range_reader, rust-astral_async_zip, uv, and xen), Oracle (.NET 10.0, .NET 9.0, glibc, ruby:3.3, and thunderbird), Red Hat (.NET 10.0, .NET 8.0, .NET 9.0, containernetworking-plugins, gvisor-tap-vsock, podman, runc, and skopeo), SUSE (agama, alloy, bubblewrap, cockpit, cups, dnsmasq, emacs, glibc, gnutls, go1.25, go1.25-openssl, go1.26, go1.26-openssl, google-guest-agent, hplip, ibus-rime, librime, kernel, libarchive, libzypp, nginx, openexr, openssh, php7, postgresql14, postgresql15, postgresql16, python311-pytest-html, redis, redis7, rsync, tree-sitter, valkey, xen, and yq), and Ubuntu (cableswig, commons-beanutils, dnsmasq, ffmpeg, foomuuri, gst-plugins-good1.0, libcaca, libgcrypt20, mediawiki, memcached, papers, postorius, tgt, and tika).