The GPU driver in the kernel in Google Chrome OS before 33.0.1750.152 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact via unknown vectors.
https://code.google.com/p/chromium/issues/detail?id=351855
http://googlechromereleases.blogspot.com/2014/03/stable-channel-update-for-chrome-os_14.html