CVE-2026-29111CWE-269

systemd: Local unprivileged user can trigger an assert

Medium · published March 23, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
6.3
In the wild
Unconfirmed
What it is

systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00173 · 6.3th percentile
Weakness
CWE-269 · Improper Privilege Management
Published
2026-03-23T21:03Z
EPSS history
Timeline
  • 23 MAR 21:03Z
    systemd: Local unprivileged user can trigger an assert
    cvelistv5