Google Chrome before 13.0.782.107 does not properly track line boxes during rendering, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors that lead to a "stale pointer."
http://code.google.com/p/chromium/issues/detail?id=78841
http://googlechromereleases.blogspot.com/2011/08/stable-channel-update.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00000.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00004.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/68941
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14671
http://support.apple.com/kb/HT4981
http://support.apple.com/kb/HT4999