SUSE-SU-2026:23470-1: moderate: Security update for systemd

[SLE-SECURITY-UPDATES]

# Security update for systemd

Announcement ID: SUSE-SU-2026:23470-1  
Release Date: 2026-09-03T20:25:16Z  
Rating: moderate  
References:

  * bsc#1237515
  * bsc#1254924
  * bsc#1259418
  * bsc#1259650
  * bsc#1261400
  * bsc#1271444

  
Cross-References:

  * CVE-2026-16742
  * CVE-2026-29111
  * CVE-2026-40226
  * CVE-2026-4105

  
CVSS scores:

  * CVE-2026-16742 ( SUSE ):  6.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-16742 ( NVD ):  6.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
  * 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-2026-40226 ( SUSE ):  7.1
    CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-40226 ( SUSE ):  6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-40226 ( NVD ):  6.4 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/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 four vulnerabilities and has two fixes can now be
installed.

## Description:

This update for systemd fixes the following issue:

Security issue fixed:

  * CVE-2026-16742: `systemd-homed`: local privilege escalation due to missing
    home record signature verification on the authentication path (bsc#1271444).

Non security issue fixed:

  * `systemd-resolved` fails to start due to write access to `tmpfs` denied
    (bsc#1237515).

## 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-6.2-1602=1

## Package List:

  * SUSE Linux Micro 6.2 (aarch64 ppc64le s390x x86_64)
    * libudev1-257.13-160000.4.1
    * systemd-experimental-debuginfo-257.13-160000.4.1
    * libsystemd0-257.13-160000.4.1
    * libudev1-debuginfo-257.13-160000.4.1
    * systemd-experimental-257.13-160000.4.1
    * udev-debuginfo-257.13-160000.4.1
    * systemd-portable-debuginfo-257.13-160000.4.1
    * systemd-container-257.13-160000.4.1
    * systemd-container-debuginfo-257.13-160000.4.1
    * systemd-debuginfo-257.13-160000.4.1
    * systemd-debugsource-257.13-160000.4.1
    * udev-257.13-160000.4.1
    * systemd-portable-257.13-160000.4.1
    * systemd-journal-remote-debuginfo-257.13-160000.4.1
    * systemd-257.13-160000.4.1
    * systemd-journal-remote-257.13-160000.4.1
    * libsystemd0-debuginfo-257.13-160000.4.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-16742.html
  * https://www.suse.com/security/cve/CVE-2026-29111.html
  * https://www.suse.com/security/cve/CVE-2026-40226.html
  * https://www.suse.com/security/cve/CVE-2026-4105.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1237515
  * https://bugzilla.suse.com/show_bug.cgi?id=1254924
  * 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=1261400
  * https://bugzilla.suse.com/show_bug.cgi?id=1271444

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