CVE 2010-4204
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.
See the 
CVE page on Mitre.org
for more details.
