CVE-2016-5274: Mozilla: use-after-free in nsFrameManager::CaptureFrameState (MFSA 2016-85, MFSA 2016-86)

Severity: Critical

CVSS Score: 9.8

Use-after-free vulnerability in the nsFrameManager::CaptureFrameState 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 by leveraging improper interaction between restyling and the Web Animations model implementation.