Privilege escalation in Containers Crun
CVE-2026-30892
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.
Vulnerability class: Privilege Escalation
EPSS: 0.002 (5.5th percentile) — read the EPSS interpretation.
Affected products
- Containers Crun — versions >= 1.19, < 1.27
- Crun_project Crun
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC)