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Vulnerability record · CVE-2026-29111 · published 23 March 2026

CVE-2026-29111: Systemd project systemd improper privilege management vulnerability

Systemd Project · Systemd

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.

5.5 CVSS 3.1 Medium EPSS 0.17% · top 94.8% CWE-269 · Improper privilege management
5.5CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
11References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a Patch
https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6 Patch
https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412 Patch
https://github.com/systemd/systemd/commit/3cee294fe8cf4fa0eff933ab21416d099942cabd Patch
https://github.com/systemd/systemd/commit/42aee39107fbdd7db1ccd402a2151822b2805e9f Patch
https://github.com/systemd/systemd/commit/54588d2dedff54bfb6036670820650e4ea74628f Patch
https://github.com/systemd/systemd/commit/7ac3220213690e8a8d6d2a6e81e43bd1dce01d69 Patch
https://github.com/systemd/systemd/commit/80acea4ef80a4bb78560ed970c34952299b890d6 Patch
https://github.com/systemd/systemd/commit/b5fd14693057e5f2c9b4a49603be64ec3608ff6c Patch
https://github.com/systemd/systemd/commit/efa6ba2ab625aaa160ac435a09e6482fc63bdbe8 Patch
https://github.com/systemd/systemd/security/advisories/GHSA-gx6q-6f99-m764 PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-29111), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.