Mozilla community member Ms2ger found an image rendering issue with WebGL when texImage2D uses use JSVAL_TO_OBJECT on arbitrary objects. This can lead to a crash on a maliciously crafted web page. While there is no evidence that this is directly exploitable, there is a possibility of remote code execution. Reference: http://www.mozilla.org/security/announce/2012/mfsa2012-30.html
Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Ms2ger as the original reporter.
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2012:0516 https://rhn.redhat.com/errata/RHSA-2012-0516.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2012:0515 https://rhn.redhat.com/errata/RHSA-2012-0515.html