CVE-2026-29111systemd: Local unprivileged user can trigger an assert
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By GitHub_M
- 20 days later
· 20 days later
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
References
References11
- https://github.com/systemd/systemd/security/advisories/GHSA-gx6q-6f99-m764 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6 (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412 (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/3cee294fe8cf4fa0eff933ab21416d099942cabd (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/42aee39107fbdd7db1ccd402a2151822b2805e9f (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/54588d2dedff54bfb6036670820650e4ea74628f (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/7ac3220213690e8a8d6d2a6e81e43bd1dce01d69 (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/80acea4ef80a4bb78560ed970c34952299b890d6 (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/b5fd14693057e5f2c9b4a49603be64ec3608ff6c (opens in a new tab)x_refsource_MISC
- https://github.com/systemd/systemd/commit/efa6ba2ab625aaa160ac435a09e6482fc63bdbe8 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-14562 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-29111)Record last updated .