RHSA-2025:20957 — Security Advisory

An update for runc is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime.

Security Fix(es):

• runc: container escape via 'masked path' abuse due to mount race conditions (CVE-2025-31133)

• runc: container escape with malicious config due to /dev/console mount and related races (CVE-2025-52565)

• runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.