Heap-based buffer overflow in Google Chrome before 17.0.963.56 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted Matroska video (aka MKV) file.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14998
http://secunia.com/advisories/48016
http://googlechromereleases.blogspot.com/2012/02/chrome-stable-update.html