Security update for systemd

Announcement ID: SUSE-SU-2026:20826-1
Release Date: 2026-03-24T09:38:06Z
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2026-29111 ( SUSE ): 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  • CVE-2026-29111 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-29111 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-4105 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • CVE-2026-4105 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2026-4105 ( NVD ): 6.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected Products:
  • SUSE Linux Micro 6.1

An update that solves two vulnerabilities and has one fix can now be installed.

Description:

This update for systemd fixes the following issues:

  • CVE-2026-4105: privilege escalation due to improper access control in RegisterMachine D-Bus method (bsc#1259650).
  • CVE-2026-29111: local unprivileged user can trigger an assert in systemd (bsc#1259418).
  • udev: check for invalid chars in various fields received from the kernel (bsc#1259697).

Changelog:

  • a943e3ce2f machined: reject invalid class types when registering machines
  • 71593f77db udev: fix review mixup
  • 73a89810b4 udev-builtin-net-id: print cescaped bad attributes
  • 0f360bfdc0 udev-builtin-net_id: do not assume the current interface name is ethX
  • 40905232e2 udev: ensure tag parsing stays within bounds
  • 7bce9026e3 udev: ensure there is space for trailing NUL before calling sprintf
  • d018ac1ea3 udev: check for invalid chars in various fields received from the kernel
  • aef6e11921 core/cgroup: avoid one unnecessary strjoina()
  • cc7426f38a sd-json: fix off-by-one issue when updating parent for array elements
  • 26a748f727 core: validate input cgroup path more prudently
  • 99d8308fde core/dbus-manager: propagate meaningful dbus errors from EnqueueMarkedJobs

Special Instructions and Notes:

  • Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Micro 6.1
    zypper in -t patch SUSE-SLE-Micro-6.1-458=1

Package List:

  • SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64)
    • systemd-254.27-slfo.1.1_4.1
    • libudev1-254.27-slfo.1.1_4.1
    • libudev1-debuginfo-254.27-slfo.1.1_4.1
    • systemd-container-254.27-slfo.1.1_4.1
    • systemd-coredump-debuginfo-254.27-slfo.1.1_4.1
    • systemd-debuginfo-254.27-slfo.1.1_4.1
    • systemd-journal-remote-debuginfo-254.27-slfo.1.1_4.1
    • systemd-portable-debuginfo-254.27-slfo.1.1_4.1
    • udev-debuginfo-254.27-slfo.1.1_4.1
    • systemd-journal-remote-254.27-slfo.1.1_4.1
    • libsystemd0-debuginfo-254.27-slfo.1.1_4.1
    • systemd-experimental-debuginfo-254.27-slfo.1.1_4.1
    • systemd-experimental-254.27-slfo.1.1_4.1
    • systemd-coredump-254.27-slfo.1.1_4.1
    • libsystemd0-254.27-slfo.1.1_4.1
    • systemd-portable-254.27-slfo.1.1_4.1
    • systemd-container-debuginfo-254.27-slfo.1.1_4.1
    • systemd-debugsource-254.27-slfo.1.1_4.1
    • udev-254.27-slfo.1.1_4.1
  • SUSE Linux Micro 6.1 (ppc64le)
    • systemd-sysvcompat-debuginfo-254.27-slfo.1.1_4.1
    • systemd-sysvcompat-254.27-slfo.1.1_4.1

References: