CVE-2010-4494
Double free vulnerability in libxml2 2.7.8 and other versions, as used in Google Chrome before 8.0.552.215 and other products, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to XPath handling.
Date published : 2010-12-07
http://lists.apple.com/archives/security-announce/2011/Mar/msg00000.html
http://lists.apple.com/archives/security-announce/2011//Mar/msg00003.html