IOAcceleratorFamily in Apple iOS before 9.3.3, tvOS before 9.2.2, and watchOS before 2.2.2 allows local users to gain privileges or cause a denial of service (NULL pointer dereference) via unspecified vectors.
Apple Security Advisory 2016-07-18-3 - watchOS 2.2.2 is now available and addresses code execution, denial of service, and various other vulnerabilities.