An issue was discovered in certain Apple products. iOS before 10.1 is affected. macOS before 10.12.1 is affected. tvOS before 10.0.1 is affected. watchOS before 3.1 is affected. The issue involves the "Kernel" component. It allows local users to execute arbitrary code in a privileged context or cause a denial of service (MIG code mishandling and system crash) via unspecified vectors.
http://packetstormsecurity.com/files/158874/Safari-Webkit-For-iOS-7.1.2-JIT-Optimization-Bug.html
https://support.apple.com/HT207269
https://support.apple.com/HT207270
https://support.apple.com/HT207271
https://support.apple.com/HT207275