CVE-2026-30892

NONE

Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation

Title source: cna

Description

crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.

References (3)

[X_Refsource_Confirm] https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj

[X_Refsource_Misc] https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01

View Writeup ZIP pw:eip

[X_Refsource_Misc] https://github.com/containers/crun/releases/tag/1.27

Scores

CVSS v3 0.0

EPSS 0.0001

EPSS Percentile 2.9%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-269

Status published

Products (2)

containers/crun >= 1.19, < 1.27

crun_project/crun 1.19 - 1.27

Published Mar 26, 2026

Tracked Since Mar 26, 2026