Medium 5.5Published Mar 23, 2026

CVE-2026-29111systemd: Local unprivileged user can trigger an assert

Updated under an hour ago (Oct 27, 2026, 6:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for systemd

Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-269
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

systemd systemd systemd:systemd (from the name)	from 239, < 257.11; from 258, < 258.5; from 259, < 259.2	CNA record
systemd_project systemd systemd_project:systemd	from 239 before 257.11; from 258 before 258.5; from 259 before 259.2	NVD

References

References

https://github.com/systemd/systemd/security/advisories/GHSA-gx6q-6f99-m764	x-refsource-confirm, patch, vendor-advisory
https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/3cee294fe8cf4fa0eff933ab21416d099942cabd	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/42aee39107fbdd7db1ccd402a2151822b2805e9f	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/54588d2dedff54bfb6036670820650e4ea74628f	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/7ac3220213690e8a8d6d2a6e81e43bd1dce01d69	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/80acea4ef80a4bb78560ed970c34952299b890d6	x-refsource-misc, patch
https://github.com/systemd/systemd/commit/b5fd14693057e5f2c9b4a49603be64ec3608ff6c	x-refsource-misc, patch
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.