Xiph.org libvorbis before 1.0 does not properly check for underpopulated Huffman trees, which allows remote attackers to cause a denial of service (crash) via a crafted OGG file that triggers memory corruption during execution of the _make_decode_tree function.
https://exchange.xforce.ibmcloud.com/vulnerabilities/42521
https://bugzilla.redhat.com/show_bug.cgi?id=444443
http://www.vupen.com/english/advisories/2008/1510/references
http://www.ubuntu.com/usn/USN-861-1
http://www.securitytracker.com/id?1020029