Input validation error in crun - CVE-2026-30892
Published: April 27, 2026
Vulnerability identifier: #VU128071
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-30892
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Container Projects
Affected software:
crun
crun
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to incorrect option parsing in make_oci_process_user() when processing the crun exec -u (--user) option. A local user can supply a crafted user value to escalate privileges.
The value 1 is interpreted as UID 0 and GID 0 instead of UID 1 and GID 0, causing the process to run with higher privileges than intended.
How to mitigate CVE-2026-30892
Install security update from vendor's website.