CVE-2019-18837: Crun Project Crun

High severity, CVSS 8.6. EPSS: 1.4% chance of exploitation in the next 30 days.

An issue was discovered in crun before 0.10.5. With a crafted image, it doesn't correctly check whether a target is a symlink, resulting in access to files outside of the container. This occurs in libcrun/linux.c and libcrun/chroot_realpath.c.

Affected products

• Crun Project Crun: before 0.10.5 (fixed in 0.10.5)
• Fedoraproject Fedora: version 30 only; version 31 only

Published 2019-11-13. Last modified 2026-06-17.