Use-after-free vulnerability in Mozilla Firefox 4.x through 6, Thunderbird before 7.0, and SeaMonkey before 2.4 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via crafted OGG headers in a .ogg file.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14352
https://bugzilla.mozilla.org/show_bug.cgi?id=675747
http://www.mozilla.org/security/announce/2011/mfsa2011-44.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:142
http://www.mandriva.com/security/advisories?name=MDVSA-2011:141
http://secunia.com/advisories/49055
http://secunia.com/advisories/46315
http://lists.opensuse.org/opensuse-updates/2011-10/msg00002.html