The SVGTextElement.getCharNumAtPosition function in Mozilla Firefox before 3.6.20, and 4.x through 5; Thunderbird 3.x before 3.1.12 and other versions before 6; SeaMonkey 2.x before 2.3; and possibly other products does not properly handle SVG text, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to a "dangling pointer."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14502
https://bugzilla.mozilla.org/show_bug.cgi?id=648094
http://www.redhat.com/support/errata/RHSA-2011-1166.html
http://www.redhat.com/support/errata/RHSA-2011-1164.html
http://www.mozilla.org/security/announce/2011/mfsa2011-33.html
http://www.mozilla.org/security/announce/2011/mfsa2011-31.html
http://www.mozilla.org/security/announce/2011/mfsa2011-30.html
http://www.mozilla.org/security/announce/2011/mfsa2011-29.html
http://www.mandriva.com/security/advisories?name=MDVSA-2011:127
http://www.debian.org/security/2011/dsa-2297
http://www.debian.org/security/2011/dsa-2296
http://www.debian.org/security/2011/dsa-2295
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html