SB2026042777 - Improper input validation in Container project crun
Published: April 27, 2026
Security Bulletin ID
SB2026042777
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2026-30892)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 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
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.
Remediation
Install update from vendor's website.