SUSE-SU-2026:21003-1: important: Security update for systemd

[SLE-UPDATES]

# Security update for systemd

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

  * bsc#1255326
  * bsc#1258344
  * bsc#1259418
  * bsc#1259650
  * bsc#1259697
  * jsc#PED-14853

  
Cross-References:

  * CVE-2026-29111
  * CVE-2026-4105

  
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:

  * https://www.suse.com/security/cve/CVE-2026-29111.html
  * https://www.suse.com/security/cve/CVE-2026-4105.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1255326
  * https://bugzilla.suse.com/show_bug.cgi?id=1258344
  * https://bugzilla.suse.com/show_bug.cgi?id=1259418
  * https://bugzilla.suse.com/show_bug.cgi?id=1259650
  * https://bugzilla.suse.com/show_bug.cgi?id=1259697
  * https://jira.suse.com/browse/PED-14853

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