SB2026052112 - Input validation error in containerd

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Main Vulnerability Database SB2026052112

SB2026052112 - Input validation error in containerd

Published: May 21, 2026

Security Bulletin ID SB2026052112
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Input validation error (CVE-ID: CVE-2026-46680)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass runAsNonRoot restrictions and run a container as root.

The vulnerability exists due to improper input validation in user ID handling when processing a numeric User directive that cannot be parsed as a 32-bit integer. A remote attacker can provide a crafted image with an /etc/passwd file mapping the large numeric string to root to bypass runAsNonRoot restrictions and run a container as root.

The issue occurs when the large numeric User value is incorrectly treated as a username instead of a numeric UID.


Remediation

Install update from vendor's website.

References