High-severity runc bugs allow container breakouts via procfs
⚠ Three high-severity vulnerabilities in the runc container runtime allow attackers to escape containers and gain host-level privileges by abusing masked paths, console bind-mounts, and redirected writes to procfs. Aleksa Sarai of SUSE and the OCI described logic flaws that let runc mount or write to sensitive /proc targets, including /proc/sys/kernel/core_pattern and /proc/sysrq-trigger. Patches are available in runc 1.2.8, 1.3.3 and 1.4.0-rc.3; administrators should update promptly, favor rootless containers where feasible, and monitor for suspicious symlink behaviour.
