Integer overflow in WebKit as used on the Research In Motion (RIM) BlackBerry Torch 9800 with firmware 6.0.0.246 in Google Chrome before 10.0.648.133 and in Apple Safari before 5.0.5 allows remote attackers to execute arbitrary code via unknown vectors related to CSS \style handling \ nodesets and a length value as demonstrated by Vincenzo Iozzo Willem Pinckaers and Ralf-Philipp Weinmann during a Pwn2Own competition at CanSecWest 2011.