PT-2026-27218 · Systemd · Systemd

Published 2026-03-23 · Updated 2026-03-23 · CVE-2026-29111

NVD

CVSS v3.1

5.5

Medium

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

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.

Fix

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

CVE-2026-29111

Affected Products

Systemd

References · 12

• https://nvd.nist.gov/vuln/detail/CVE-2026-29111 · Security Note
• https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412 · Note
• https://github.com/systemd/systemd/commit/80acea4ef80a4bb78560ed970c34952299b890d6 · Note
• https://github.com/systemd/systemd/commit/efa6ba2ab625aaa160ac435a09e6482fc63bdbe8 · Note
• https://github.com/systemd/systemd/commit/3cee294fe8cf4fa0eff933ab21416d099942cabd · Note
• https://github.com/systemd/systemd/commit/42aee39107fbdd7db1ccd402a2151822b2805e9f · Note
• https://github.com/systemd/systemd/commit/7ac3220213690e8a8d6d2a6e81e43bd1dce01d69 · Note
• https://github.com/systemd/systemd/commit/54588d2dedff54bfb6036670820650e4ea74628f · Note
• https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6 · Note
• https://github.com/systemd/systemd/security/advisories/GHSA-gx6q-6f99-m764 · Note
• https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a · Note
• https://github.com/systemd/systemd/commit/b5fd14693057e5f2c9b4a49603be64ec3608ff6c · Note