The security_context_to_sid_core function in security/selinux/ss/services.c in the Linux kernel before 3.13.4 allows local users to cause a denial of service (system crash) by leveraging the CAP_MAC_ADMIN capability to set a zero-length security context.
https://github.com/torvalds/linux/commit/2172fa709ab32ca60e86179dc67d0857be8e2c98
https://bugzilla.redhat.com/show_bug.cgi?id=1062356
http://www.ubuntu.com/usn/USN-2141-1
http://www.ubuntu.com/usn/USN-2140-1
http://www.ubuntu.com/usn/USN-2139-1
http://www.ubuntu.com/usn/USN-2138-1
http://www.ubuntu.com/usn/USN-2137-1
http://www.ubuntu.com/usn/USN-2136-1
http://www.ubuntu.com/usn/USN-2135-1
http://www.ubuntu.com/usn/USN-2134-1
http://www.ubuntu.com/usn/USN-2133-1
http://www.ubuntu.com/usn/USN-2129-1
http://www.ubuntu.com/usn/USN-2128-1
http://www.securityfocus.com/bid/65459
http://www.openwall.com/lists/oss-security/2014/02/07/2
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.4
http://secunia.com/advisories/59406
http://secunia.com/advisories/59309
http://secunia.com/advisories/59262
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
http://linux.oracle.com/errata/ELSA-2014-3043.html