The WebGL implementation in Google Chrome before 37.0.2062.94 does not ensure that clear calls interact properly with the state of a draw buffer, which allows remote attackers to cause a denial of service (read of uninitialized memory) via a crafted CANVAS element, related to gpu/command_buffer/service/framebuffer_manager.cc and gpu/command_buffer/service/gles2_cmd_decoder.cc.
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