An issue was discovered in certain Apple products. macOS before 10.12.2 is affected. The issue involves the "CoreCapture" component. It allows local users to cause a denial of service (NULL pointer dereference) via unspecified vectors.
Apple Security Advisory 2016-12-13-1 - macOS 10.12.2 is now available and addresses arbitrary code execution, denial of service, and various other vulnerabilities.