Mozilla: Crash when using shared memory in JavaScript (MFSA 2015-87)

The js::jit::AssemblerX86Shared::lockaddl function in the JavaScript implementation in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to cause a denial of service application crash by leveraging the use of shared memory and accessing 1 an Atomics object or 2 ...