WebKit, as used in Google Chrome before 7.0.517.44, webkitgtk before 1.2.6, and other products, accesses a frame object after this object has been destroyed, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12174
https://bugzilla.redhat.com/show_bug.cgi?id=656126
https://bugs.webkit.org/show_bug.cgi?id=48281
http://www.vupen.com/english/advisories/2011/0552
http://www.vupen.com/english/advisories/2011/0216
http://www.securityfocus.com/bid/45718
http://www.redhat.com/support/errata/RHSA-2011-0177.html
http://trac.webkit.org/changeset/70517
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052906.html
http://googlechromereleases.blogspot.com/2010/11/stable-channel-update.html