The WebGL implementation in Mozilla Firefox 4.x through 4.0.1 does not properly restrict write operations, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13912
https://bugzilla.mozilla.org/show_bug.cgi?id=657201
http://www.mozilla.org/security/announce/2011/mfsa2011-26.html
http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00001.html