LWN.net

The Servo web-browser engine project has published an update about all of the changes that landed in June 2026, along with version 0.4.0 of the Servo Tech Demo. This release includes a record 558 commits, better layout correctness for web sites, improved WebGPU support, enhancements for users who are using the servoshell test browser, and many performance and stability fixes.

Song Liu believes that the way that programmers assemble complex BPF programs will be changing rapidly in the future. At a session of the 2026 Linux Storage, Filesystem, Memory-Management, and BPF Summit, he shared his thoughts on what that change could look like, though he did not have any concrete proposals for what, if anything, the BPF maintainers should do. He anticipates an ecosystem of Rust BPF packages developing, which is significant because BPF does not really have a package manager at the moment.

The Arch Linux DevOps team has announced that adoption of orphaned packages in the Arch User Repository (AUR) has been disabled due to "the current influx of malicious package adoptions and follow-up commits made via the AUR". Michael Taggart has posted a brief analysis of the malware being added to a long list of packages in this round of attacks. The payload appears to be an remote-access trojan (RAT) that takes commands over the Tor network and attempts to upload a wide range of user data.

The project had suspended new account registration in June. That followed a campaign in which an attacker or attackers created new accounts to adopt orphaned packages and push malicious updates to them that would install malware on user systems. AUR registration was reopened on July 13 after the DevOps team added some minor, and apparently ineffective, restrictions on creating new accounts.

Security updates have been issued by AlmaLinux (kernel, nodejs-nodemon, nodejs22, nodejs24, openssh, and vim), Debian (gsasl and ruby-rack), Fedora (dokuwiki, lego, libnbd, nasm, pack, unbound, and valkey), Mageia (389-ds-base, libxfont2, nghttp2, and perl-DBI), SUSE (apptainer, bind, ffmpeg-7, freerdp, google-osconfig-agent, graphicsmagick, helm, ImageMagick, java-17-openjdk, java-25-openjdk, keybase-client, kubernetes1.34-apiserver, kubernetes1.35-apiserver, kubernetes1.36-apiserver, kubevirt1.8-container-disk, libarchive, logcli, net-tools, openssl-3, PackageKit, perl-Net-DNS, prometheus-ha_cluster_exporter, python-dulwich, python-sqlparse, python-urwid, python3-pyOpenSSL, python313, python3, runc, s2n, tomcat, tomcat10, tomcat11, and valkey), and Ubuntu (libinput, linux-intel-iot-realtime, linux-intel-iotg-5.15, openssl, python2.7, python3.5, and ruby-sinatra).

Linux provides a system call (mkdir()) to create a directory, and a few variants of open() that can open a directory. There is, however, no system call in Linux that can create and open a directory in a single, race-free call. Jori Koolstra has been working on remedying that situation, most recently by repurposing a set of open() flags that currently return an error. There are, however, concerns that show just how hard it can be to create user-space interfaces that do not present traps for application developers.

Greg Kroah-Hartman has announced the release of the 6.18.41, 6.12.100, 6.6.147, 6.1.180, 5.15.213, and 5.10.262 stable kernels.

Each of these kernels contains a single fix for a use-after-free vulnerability (CVE-2026-64560). Users of these kernels are advised to upgrade.

Security updates have been issued by AlmaLinux (gstreamer1-plugins-bad-free, libtiff, libXfont2, nodejs:22, nodejs:24, and rest), Debian (expat and nss), Fedora (libssh, nginx, nginx-mod-brotli, nginx-mod-fancyindex, nginx-mod-headers-more, nginx-mod-modsecurity, nginx-mod-naxsi, nginx-mod-vts, nodejs24, perl-HTTP-Date, proftpd, squid, unbound, and wordpress), Oracle (c-ares, edk2, freerdp, go-fdo-server, libreswan, mariadb-connector-c, and nginx), SUSE (alloy, apache-commons-lang3, google-guice, maven, maven-resolver, xmvn, apache-sshd, apptainer, avahi, distribution, glib2, go1.26-openssl, go1.25-openssl, go1.24-openssl, go1.23-openssl, go1.22-openssl, go1.26, go1.25, go1.24, go1.23, go1.22, go1.21, gstreamer-plugins-bad, helm, ImageMagick, java-17-openjdk, java-25-openjdk, liboqs, oqs-provider, libssh, nginx, nm-configurator, nmap, openssl-3, openvpn, PackageKit, perl, perl-DBI, perl-HTTP-Date, perl-XML-Bare, python-msgpack-python, python-sh, python-ujson, python-urllib3, runc, samba, sssd, wget, wpa_supplicant, and xen), and Ubuntu (linux-nvidia, linux-nvidia-7.0 and linux-nvidia-6.17).

Inside this week's LWN.net Weekly Edition:

• Front: Hazard pointers; DFSG team; Swap devices; Netkit and BPF; BPF inlined functions; Fedora GRUB; gccrs.
• Briefs: RIP Dan Williams; Debian LLM resolution; Fedora 45 process; Codeberg LLM policy; GCC LLM policy; GNU Binutils 2.47; GNU C Library 2.44; Wayfire 0.11; Quotes; ...
• Announcements: Newsletters, conferences, security updates, patches, and more.

BPF programs use BPF type format (BTF) debugging information in order to determine how to interact with functions in the kernel. Specifically, tracing a kernel function involves finding its address in the kernel's BTF section — but that doesn't work for functions that have been inlined, and therefore don't have a single, specific address. Alan Maguire wants to add information about inlined functions to BTF in order to allow them to be traced, and led a session on that topic at the 2026 Linux Storage, Filesystem, Memory-Management, and BPF Summit.

Greg Kroah-Hartman has announced the release of the 6.12.99, 6.6.146, and 6.1.179 stable kernels. This batch of stable kernels includes a single fix for a regression caused by this commit. Users of those kernels should upgrade.

Leo Sandoval and Marta Lewandowska have put forward a change proposal for Fedora 45, which is expected in October, to provide a separate, slimmed-down version of GRUB for a niche use case. The new package would be in addition to the main GRUB package and would not replace it for the majority of Fedora users. The idea met with some resistance from Fedora contributors who thought that it would be better to use systemd-boot, or another modern bootloader, rather than trying to wrangle GRUB into a suitable state for the use case. The Fedora Engineering Steering Council (FESCo), however, voted to accept the change on July 7.

The GCC steering committee has announced that it has accepted an AI contributions policy recommended by the GCC AI policy working group.

The policy, in part, states that the project will decline any "legally significant contributions which include LLM-generated content or are derived from LLM-generated content". It uses the definition of "legally significant" from the GNU Project maintainer guidelines, which holds that the threshold is "around 15 lines of code and/or text" to qualify as significant for copyright purposes. GCC maintainers may, however, choose to accept legally significant test cases that are generated by an LLM.

The policy does not forbid use of LLMs for research, analysis, bug discovery and reporting, patch review, etc. as long as the output is not included in contributions. The committee says that it expects the policy will evolve and will be revisited periodically.

Security updates have been issued by AlmaLinux (dovecot, go-fdo-client, go-fdo-server, kernel, kernel-rt, and sssd), Debian (calibre, hplip, libraw, and samba), Fedora (btrbk, chromium, gpsd, kronosnet, and restic), Mageia (gstreamer1.0-libav and libslirp), Slackware (libarchive, samba, and seamonkey), SUSE (agama-web-ui, chromium, gimp, glib2, GraphicsMagick, ignition, ImageMagick, java-21-openjdk, libssh, libssh-config, nginx, nmap, nsd, python-urllib3, python313-CherryPy, rsyslog, samba, sssd, valkey, webkit2gtk3, and yq), and Ubuntu (freerdp3, linux, linux-aws, linux-aws-5.4, linux-aws-fips, linux-azure, linux-azure-5.4, linux-azure-fips, linux-bluefield, linux-fips, linux-gcp, linux-gcp-5.4, linux-gcp-fips, linux-hwe-5.4, linux-iot, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp, linux-azure-fips, linux-ibm, linux-ibm-5.4, linux-kvm, and linux-raspi, linux-raspi-5.4).

The gccrs project, which is creating a Rust frontend for the GCC compiler, has spent the first half of 2026 focusing on compiling the Linux kernel. By testing the compiler against the kernel crates, the development team has made significant progress toward generating correct code for other Rust programs. As detailed in the project's weekly and monthly reports, this effort has uncovered and resolved problems in areas such as attribute handling (described in the report for February), name resolution, and resource management (both detailed in the May report). Currently, the compiler can only handle simple standalone programs, but that situation could change rapidly in the coming months.

Version 0.11 of the wlroots-based Wayfire Wayland compositor has been released. Notable changes include better fractional scaling, per-output ICC profiles, support for additional Wayland protocols, and more.