CVE-2026-40223: Systemd Project Systemd

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

In systemd 258 before 260, a local unprivileged user can trigger an assert when a Delegate=yes and User=<unset> unit exists and is running.

Affected products

• Systemd Project Systemd: from 258, before 260 (fixed in 260)

Published 2026-04-10. Last modified 2026-06-17.