
CVE-2026-40223 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. https://www.cve.org/CVERecord?id=CVE-2026-40223
Post summary
The post discloses a local assert bug in systemd 258–259 triggered by specific unit settings, allowing unprivileged users to trigger an assert. No exploit code, active exploitation, or patch is referenced.
