A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.
https://github.com/containers/crun/
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-75360
https://bugzilla.redhat.com/show_bug.cgi?id=2531224