Critical runC Vulnerabilities Enable Container Escape and Host Compromise

Security researchers disclosed three critical vulnerabilities in runC, the container runtime used by Docker and Kubernetes, allowing attackers to escape container isolation and gain root access to host systems. The vulnerabilities, tracked as CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881, exploit weaknesses in handling masked paths and bind mounts. These flaws affect nearly all versions of runC and pose significant risks to cloud-native environments.