description: In FreeBSD 13.0-STABLE before n245118, 12.2-STABLE before r369552, 11.4-STABLE before r369560, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, a superuser inside a FreeBSD jail configured with the non-default allow.mount permission could cause a race condition between the lookup of ".." and remounting a filesystem, allowing access to filesystem hierarchy outside of the jail.
problem types: Time-of-check Time-of-use Race Condition
affected:
{
product: FreeBSD
vendor: n/a
versions:
status: affected, version: FreeBSD 12.2-RELEASE before p6, 11.4-RELEASE before p9
}