CVE-2026-29111
systemd: Local unprivileged user can trigger an assert
- State
- Published
- Severity
- 5.5 Medium
- Published
- Mar 23, 2026
- Updated
- Mar 25, 2026
- Reserved
- Mar 3, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-269 Improper Privilege Management
Affected Products
| Product | Versions |
|---|---|
systemdsystemd |
|
References
- https://github.com/systemd/systemd/security/advisories/GHSA-gx6q-6f99-m764
- https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a
- https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6
- https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412
- https://github.com/systemd/systemd/commit/3cee294fe8cf4fa0eff933ab21416d099942cabd
- https://github.com/systemd/systemd/commit/42aee39107fbdd7db1ccd402a2151822b2805e9f
- https://github.com/systemd/systemd/commit/54588d2dedff54bfb6036670820650e4ea74628f
- https://github.com/systemd/systemd/commit/7ac3220213690e8a8d6d2a6e81e43bd1dce01d69
- https://github.com/systemd/systemd/commit/80acea4ef80a4bb78560ed970c34952299b890d6
- https://github.com/systemd/systemd/commit/b5fd14693057e5f2c9b4a49603be64ec3608ff6c
- https://github.com/systemd/systemd/commit/efa6ba2ab625aaa160ac435a09e6482fc63bdbe8
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.