CVE 2012-2853
The webRequest API in Google Chrome before 21.0.1180.57 on Mac OS X and Linux, and before 21.0.1180.60 on Windows and Chrome Frame, does not properly interact with the Chrome Web Store, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via a crafted web site.
See the
CVE page on Mitre.org
for more details.