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01
OpenSSH 10.4 released
OpenSSH 10.4 has been released. In addition to a number of security and bug fixes, there are a few notable changes; this release adds experimental support for a composite post-quantum signature scheme combining ML-DSA 44 and Ed25519 as described in this IETF draft . With 10.4, if OpenSSH is compiled with sandbox support it will fail on Linux systems that have not enabled SECCOMP or NO_NEW_PRIVS ; prior to this release, sshd would log an error but continue operation. See the release notes for a fjzb
02
[$] The kernel's iomap layer
Conversations about the kernel's filesystem implementations often involve a layer called "iomap", but relatively few people can reliably say what iomap actually is. That is just the kind of gap that LWN exists to fill. In short, iomap handles the mapping between data in the filesystem space (identified by a file of interest, and an offset within that file) and in the storage space (which may be a memory location, or a set of blocks on a storage device). Using that mapping, iomap handles a long lcorbet
03
Security updates for Monday
Security updates have been issued by AlmaLinux (container-tools:rhel8, grafana, grafana-pcp, kernel, ruby:2.5, and ruby:3.3), Debian (bird3, chromium, kernel, linux-6.1, mediawiki, nginx, openvpn, php-phpseclib, php8.2, php8.4, and sympa), Fedora (7zip, buildah, chromium, clamav, freerdp, leptonica, mariadb10.11, mariadb11.8, nextcloud, nsd, openqa, openvpn, os-autoinst, pdns, pdns-recursor, perl-Crypt-ScryptKDF, podman, python-jupyter-server, and python-streamlink), Mageia (mariadb and yt-dlp),jzb
04
Kernel prepatch 7.2-rc2
The 7.2-rc2 kernel prepatch is out for testing. Linus said: " It's Sunday afternoon, and rc2 is out. Things look very normal - it's not a small rc2, but it's in line with recent releases, and slightly smaller than rc2 was in 7.1. Let's see how that all continues, but so far so good. "corbet
05
Seven stable kernels for Saturday including two security fixes
Greg Kroah-Hartman has announced the release of the 7.1.3 , 6.18.38 , 6.12.95 , 6.6.144 , 6.1.177 , 5.15.211 , and 5.10.260 stable kernels. Several kernels in this batch include a fix for a vulnerability introduced in the 6.0 kernel in IPv6 ( CVE-2026-53362 ), which could allow an attacker to escape a container and gain root access . There is also a fix for a use-after-free bug in KVM ( CVE-2026-53359 ) that was introduced in the 2.6.36 kernel. As usual, each stable kernel includes a number of fjzb
06
Four vulnerabilities in Guix
The GNU Guix project has announced three vulnerabilities in the guix substitute utility as well as a fourth that affects the guix pull and guix time-machine commands. The impact of the vulnerabilities ranges from remote privilege escalation to local disclosure of sensitive files. The remote exploitation of guix substitute only requires that the vulnerable system attempt to download a binary substitute. Any configured substitute server, including ones discovered using guix-daemon 's --discover opjzb
07
[$] Limiting negative dentries
A number of problems related to negative directory entries (dentries) were the topic of a filesystem-track session at the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit . Negative dentries are used to indicate that a file of a given name does not exist in a directory; it is an optimization that short-circuits the lookup of the file name when the answer is already known. Miklos Szeredi led a session that discussed some problems that come from having too many negative dentries fjake
08
Security updates for Friday
Security updates have been issued by AlmaLinux (389-ds-base, bind9.18, evince, fence-agents, freerdp, frr, frr10, gimp, gnutls, hplip, jmc, mariadb:11.8, mysql:8.4, php:7.4, postgresql-jdbc, postgresql:15, postgresql:16, valkey, xorg-x11-server, and xorg-x11-server-Xwayland), Debian (fastnetmon), Fedora (7zip, apptainer, cpp-httplib, mysql8.4, and nmap), Oracle (freerdp, giflib, glib2, glibc, kernel, libreoffice, libvirt, mariadb:10.11, postgresql, python3.11, python3.12, rrdtool, and thunderbirjzb
09
CalyxOS is back
In August 2025, the CalyxOS privacy-focused Android distribution announced that it was pausing all releases while it reworked its release process, security protocols, and changed its signing keys following the departure of one of its founders. The project has now announced that it is " officially back from the hiatus " with the 7.2.2.0 release. CalyxOS 7.2.2.0 is signed by us using a new HSM-based, open-source signing solution we designed to enhance the security of the entire signing process, enjzb
10
Kernel archive /pub tree restoring
A few astute observers have noticed that some content on kernel.org had disappeared and were understandably concerned. Konstantin Ryabitsev has provided an update via social.kernel.org: There was an unfortunate error while changing the kernel.org primary/secondary mirroring infrastructure, which resulted in the /pub tree suddenly becoming empty. No data was lost, just public mirror copies. Everything is now being restored, but deletes are fast and restores are slow, so thank you for your patiencjzb
11
Spoofed email from LWN
We were made aware today of an email sent to a reader that was spoofed to appear to be from LWN. The message claimed, among other things, that we were providing personal information about the reader to another site user. As is explained in our privacy policy we do not, and would not, provide such information. If any other readers have received an odd message from LWN, it is an attempt at a hoax; if in doubt, please check the DKIM header of the email. Any email that does come from LWN will have ajzb
12
Fedora Council proposes pausing Community Initiatives
Aoife Moloney has, on behalf of the Fedora Council , posted an announcement that the Fedora Council is " proposing we pause the Community Initiatives process as an official project process " because it has decided the current process is ineffective. It is also closing discussion regarding the AI developer desktop initiative covered by LWN in May. The Fedora Objectives/Initiatives framework was never intended as a mandatory prerequisite to do the work in Fedora. It supposed to help by focusing thjzb
13
[$] Two LLM-assisted memory-management patch sets
The kernel community (like many other free-software projects) has recently seen a large influx of patches developed with the assistance of large language models (LLMs). Those patches tend to come from developers who were previously unknown to the community. At the moment, though, the memory-management developers are evaluating two large patch sets, developed with LLM assistance, that were submitted by established and well-respected developers. The rather different reception accorded to that workcorbet
14
Security updates for Thursday
Security updates have been issued by AlmaLinux (giflib, kernel, mariadb:10.11, mod_http2, php, rrdtool, ruby, ruby:3.3, and ruby:4.0), Debian (jq and node-lodash), Fedora (caddy, hut, ipp-usb, kernel, opkssh, rclone, thunderbird, and transmission), SUSE (389-ds, 7zip, alsa, amazon-ecs-init, avahi, cadvisor, cosign, cups, dnsdist, docker, dracut, firefox, firewalld, giflib, glib-networking, glycin-loaders, google-cloud-sap-agent, google-guest-agent, gsasl, hauler, helm, ImageMagick, kernel, keylijzb
15
[$] LWN.net Weekly Edition for July 2, 2026
Inside this week's LWN.net Weekly Edition: Front : Xsnow protestware; Git 2.55; Rhombus; kernel hardening; More LSFMM+BPF coverage; 7.2 merge window; Secure Boot certificate expiration; Ceph and Garage; OSPM 2026. Briefs : Akrites; Mageia 10; Git 2.55.0; Podman 6.0; systemd v261; Creative Commons chat; Quotes; ... Announcements : Newsletters, conferences, security updates, patches, and more.jzb