CVE-2026-29111

Summary

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.

Affected Software

VendorProductVersion RangeStatus
systemdsystemd>= 239, < 257.11affected
systemdsystemd>= 258, < 258.5affected
systemdsystemd>= 259, < 259.2affected

Weaknesses

  • CWE-269: CWE-269: Improper Privilege Management

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References