Use-after-free vulnerability in Google Chrome before 17.0.963.56 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving counter nodes, related to a "read-after-free" issue.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14919
http://support.apple.com/kb/HT5503
http://support.apple.com/kb/HT5485
http://support.apple.com/kb/HT5400
http://secunia.com/advisories/48016
http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html
http://lists.apple.com/archives/security-announce/2012/Sep/msg00001.html
http://lists.apple.com/archives/security-announce/2012/Jul/msg00000.html
http://googlechromereleases.blogspot.com/2012/02/chrome-stable-update.html