Google Chrome before 9.0.597.84 does not properly handle a missing key in an extension, which allows remote attackers to cause a denial of service (application crash) via a crafted extension.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14540
http://www.vupen.com/english/advisories/2011/0671
http://www.debian.org/security/2011/dsa-2192
http://secunia.com/advisories/43782
http://googlechromereleases.blogspot.com/2011/02/stable-channel-update.html