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[USN-8626-1] systemd vulnerabilities

Posted on 10 August 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8626-1
August 10, 2026

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

- Ubuntu 26.04 LTS
- 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-homed did not properly verify the signature
of home records. A local attacker could possibly use this issue to add
arbitrary system groups to a logged-in user and gain elevated privileges.
(CVE-2026-16742)

It was discovered that systemd-machined incorrectly handled certain polkit
authorization checks. A local attacker could possibly use this issue to
terminate arbitrary processes, including privileged ones. This issue only
affected Ubuntu 26.04 LTS. (CVE-2026-15060)

It was discovered that systemd-oomd did not properly validate certain IPC
requests. A local attacker could possibly use this issue to terminate
arbitrary processes. (CVE-2026-15059)

Update instructions:

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

Ubuntu 26.04 LTS
systemd 259.5-0ubuntu3.4
systemd-homed 259.5-0ubuntu3.4
systemd-oomd 259.5-0ubuntu3.4

Ubuntu 24.04 LTS
systemd 255.4-1ubuntu8.17
systemd-homed 255.4-1ubuntu8.17
systemd-oomd 255.4-1ubuntu8.17

Ubuntu 22.04 LTS
systemd 249.11-0ubuntu3.22
systemd-oomd 249.11-0ubuntu3.22

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8626-1
CVE-2026-15059, CVE-2026-15060, CVE-2026-16742

Package Information:
https://launchpad.net/ubuntu/+source/systemd/259.5-0ubuntu3.4
https://launchpad.net/ubuntu/+source/systemd/255.4-1ubuntu8.17
https://launchpad.net/ubuntu/+source/systemd/249.11-0ubuntu3.22

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