An issue was discovered in certain Apple products. macOS before 10.12.4 is affected. The issue involves the "AppleRAID" component. It allows attackers to execute arbitrary code in a privileged context or cause a denial of service (use-after-free) via a crafted app.
https://support.apple.com/HT207615
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-11621