An issue was discovered in certain Apple products. macOS before 10.12.1 is affected. The issue involves the "AppleGraphicsControl" component. It allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.
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.