[USN-8119-1] systemd vulnerabilities

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-8119-1
March 23, 2026

systemd vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in systemd.

Software Description:
- systemd: system and service manager

Details:

It was discovered that systemd incorrectly handled certain cgroup paths.
A local attacker could possibly use this issue to cause systemd to crash,
resulting in a denial of service. (CVE-2026-29111)

It was discovered that the systemd udev component incorrectly handled
certain fields received from the kernel. An attacker with a malicious
device could possibly use this issue to execute arbitrary code as an
administrator (root).

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  libsystemd0                     257.9-0ubuntu2.3
  libudev1                        257.9-0ubuntu2.3
  systemd                         257.9-0ubuntu2.3
  udev                            257.9-0ubuntu2.3

Ubuntu 24.04 LTS
  libsystemd0                     255.4-1ubuntu8.14
  libudev1                        255.4-1ubuntu8.14
  systemd                         255.4-1ubuntu8.14
  udev                            255.4-1ubuntu8.14

Ubuntu 22.04 LTS
  libsystemd0                     249.11-0ubuntu3.19
  libudev1                        249.11-0ubuntu3.19
  systemd                         249.11-0ubuntu3.19
  udev                            249.11-0ubuntu3.19

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8119-1
  CVE-2026-29111

Package Information:
  https://launchpad.net/ubuntu/+source/systemd/257.9-0ubuntu2.3
  https://launchpad.net/ubuntu/+source/systemd/255.4-1ubuntu8.14
  https://launchpad.net/ubuntu/+source/systemd/249.11-0ubuntu3.19
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