Integer signedness error in the SharedBufferManagerParent::RecvAllocateGrallocBuffer function in the buffer-management implementation in the graphics layer in Mozilla Firefox OS before 2.2 might allow attackers to cause a denial of service (memory corruption) via a negative value of a size parameter.
https://bugzilla.mozilla.org/show_bug.cgi?id=1145389
http://www.securityfocus.com/bid/76253
http://www.mozilla.org/security/announce/2015/mfsa2015-77.html