Security update for systemd

Announcement ID: SUSE-SU-2026:21003-1
Release Date: 2026-04-07T15:08:39Z
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 6.2

An update that solves two vulnerabilities, contains one feature and has three fixes can now be installed.

Description:

This update for systemd fixes the following issues:

Update to systemd v257.13:

Security 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: local root execution via malicious hardware devices and unsanitized kernel output (bsc#1259697).

Non security issues:

  • Avoid shipping (empty) directories and ghost files in /var (jsc#PED-14853).
  • Sign systemd-boot EFI binary on aarch64 (bsc#1258344)
  • terminal-util: stop doing 0/upper bound check in tty_is_vc() (bsc#1255326)

Changelog:

  • 6941d92dc2 machined: reject invalid class types when registering machines (bsc#1259650 CVE-2026-4105)
  • 03bb697b8d udev: check for invalid chars in various fields received from the kernel (bsc#1259697)
  • 54588d2ded core: validate input cgroup path more prudently (bsc#1259418 CVE-2026-29111)
  • fb9d92682b terminal-util: stop doing 0/upper bound check in tty_is_vc() (bsc#1255326)

For a complete list of changes, visit: https://github.com/openSUSE/systemd/compare/3c53ef3ea20bd43ef587cbdfa7107aeb1ef55654...d349fc5cd4f9ee2b7884c2610647e92806d14b28

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 6.2
    zypper in -t patch SUSE-SL-Micro-6.2-485=1

Package List:

  • SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    • systemd-portable-257.13-160000.1.1
    • libsystemd0-debuginfo-257.13-160000.1.1
    • libsystemd0-257.13-160000.1.1
    • udev-257.13-160000.1.1
    • systemd-debugsource-257.13-160000.1.1
    • libudev1-debuginfo-257.13-160000.1.1
    • systemd-container-257.13-160000.1.1
    • systemd-experimental-debuginfo-257.13-160000.1.1
    • udev-debuginfo-257.13-160000.1.1
    • systemd-experimental-257.13-160000.1.1
    • systemd-container-debuginfo-257.13-160000.1.1
    • systemd-journal-remote-257.13-160000.1.1
    • systemd-portable-debuginfo-257.13-160000.1.1
    • systemd-journal-remote-debuginfo-257.13-160000.1.1
    • systemd-debuginfo-257.13-160000.1.1
    • systemd-257.13-160000.1.1
    • libudev1-257.13-160000.1.1

References: