Use-after-free vulnerability in the MediaInputPort class in Mozilla Firefox before 31.0 and Thunderbird before 31.0 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by leveraging incorrect Web Audio control-message ordering.
https://security.gentoo.org/glsa/201504-01
https://bugzilla.mozilla.org/show_bug.cgi?id=1020411
http://www.securitytracker.com/id/1030620
http://www.securitytracker.com/id/1030619
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.mozilla.org/security/announce/2014/mfsa2014-58.html