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CVE-2026-29111

systemd: Local unprivileged user can trigger an assert

Published: Mar 23, 2026Updated: Apr 15, 2026 Sources: CVE List NVDCWE-269
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.1%
Top 97.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-269NVD-CWE-noinfo

Affected Products

systemdsystemd project
On-prem
Operating Systems / linux-distro
systemdsystemd
Embedded
Operating Systems / linux-distro
systemd projectoss-projectOperating Systemsaka systemd
systemdoss-projectDEOperating Systemsaka systemd

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/systemd/systemd/commit/1d22f706bd04f45f8422e17fbde3f56ece17758a
github.com
https://github.com/systemd/systemd/commit/20021e7686426052e3a7505425d7e12085feb2a6
github.com
https://github.com/systemd/systemd/commit/21167006574d6b83813c7596759b474f56562412
github.com
and 8 more references View all →

Timeline

Published
Mar 23, 2026
Last Updated
Apr 15, 2026

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