Google Chrome before 15.0.874.120 does not properly implement the MKV and Vorbis media handlers, which allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors.
code.google.com/p/chromium/issues/detail?id=100492
code.google.com/p/chromium/issues/detail?id=100543
googlechromereleases.blogspot.com/2011/11/stable-channel-update.html
secunia.com/advisories/46933
secunia.com/advisories/49089
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14267