Mozilla: Heap-use-after-free in mozilla::a11y::DocAccessible::ProcessInvalidationList (MFSA 2016-85, MFSA 2016-86)

Use-after-free vulnerability in the mozilla::a11y::DocAccessible::ProcessInvalidationList function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird 45.4 allows remote attackers to execute arbitrary code or cause a denial of service heap memory corruption via an...