An issue was discovered in certain Apple products. macOS before 10.13.5 is affected. The issue involves the "NVIDIA Graphics Drivers" component. It allows attackers to execute arbitrary code in a privileged context via a crafted app that triggers a SetAppSupportBits use-after-free because of a race condition.
https://www.exploit-db.com/exploits/44847/
https://support.apple.com/HT208849
https://bugs.chromium.org/p/project-zero/issues/detail?id=1549