An issue was discovered in certain Apple products. macOS before 10.12.1 is affected. The issue involves the "ATS" component. It allows local users to gain privileges or cause a denial of service (memory corruption and application crash) via unspecified vectors.
Apple Security Advisory 2016-10-24-2 - macOS Sierra 10.12.1 is now available and addresses code execution, privilege escalation, and various other vulnerabilities.