An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "Kernel" component. A buffer overflow in mptcp_usr_connectx allows attackers to execute arbitrary code in a privileged context via a crafted app.
https://www.exploit-db.com/exploits/44849/
https://support.apple.com/HT208851
https://support.apple.com/HT208850
https://support.apple.com/HT208849
https://support.apple.com/HT208848
https://bugs.chromium.org/p/project-zero/issues/detail?id=1558