The GPU process in Google Chrome OS before 25.0.1364.173 allows attackers to cause a denial of service or possibly have unspecified other impact via vectors related to an "overflow."
https://code.google.com/p/chromium/issues/detail?id=181083
http://googlechromereleases.blogspot.com/2013/03/stable-channel-update-for-chrome-os_15.html