CVE-2025-4437: Red Hat Openshift Container Platform 4

Medium severity, CVSS 5.7. EPSS: 0.2% chance of exploitation in the next 30 days.

There's a vulnerability in the CRI-O application where when container is launched with securityContext.runAsUser specifying a non-existent user, CRI-O attempts to create the user, reading the container's entire /etc/passwd file into memory. If this file is excessively large, it can cause the a high memory consumption leading applications to be killed due to out-of-memory. As a result a denial-of-service can be achieved, possibly disrupting other pods and services running in the same host.

Affected products

• Red Hat Red Hat Openshift Container Platform 4

Published 2025-08-20. Last modified 2026-09-26.