CVE 2012-2849
Off-by-one error in the GIF decoder 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, allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted image.
See the 
CVE page on Mitre.org
for more details.
