Google Chrome before 11.0.696.57 does not properly handle DOM id maps, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors that lead to "dangling pointers."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14279
https://exchange.xforce.ibmcloud.com/vulnerabilities/67158
http://support.apple.com/kb/HT4999
http://support.apple.com/kb/HT4981
http://support.apple.com/kb/HT4808
http://lists.apple.com/archives/security-announce/2011//Jul/msg00002.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00000.html
http://googlechromereleases.blogspot.com/2011/04/chrome-stable-update.html