CVE-2013-5710
The nullfs implementation in sys/fs/nullfs/null_vnops.c in the kernel in FreeBSD 8.3 through 9.2 allows local users with certain permissions to bypass access restrictions via a hardlink in a nullfs instance to a file in a different instance.
Date published : 2013-09-23
http://svnweb.freebsd.org/base?view=revision&revision=255442