CVE-2012-2868
Race condition in Google Chrome before 21.0.1180.89 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving improper interaction between worker processes and an XMLHttpRequest (aka XHR) object.
Date published : 2012-08-31
http://code.google.com/p/chromium/issues/detail?id=136881
http://googlechromereleases.blogspot.com/2012/08/stable-channel-update_30.html