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.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15842
https://exchange.xforce.ibmcloud.com/vulnerabilities/78177
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00030.html
http://googlechromereleases.blogspot.com/2012/08/stable-channel-update_30.html