An issue was discovered in certain Apple products. iOS before 10.2 is affected. macOS before 10.12.2 is affected. watchOS before 3.1.3 is affected. The issue involves the "IOKit" component. It allows attackers to obtain sensitive information from kernel memory via a crafted app.
https://support.apple.com/HT207487
https://support.apple.com/HT207423
https://support.apple.com/HT207422