An issue was discovered in certain Apple products. macOS before 10.12.2 is affected. The issue involves the "Directory Services" component. It allows local users to gain privileges or cause a denial of service (use-after-free) via unspecified vectors.
MacOS Sierra version 10.12 16A323 allows a double vm_deallocate in userspace MIG code that can lead to a use-after-free vulnerability in mach services.