An issue was discovered in certain Apple products. iOS before 10.3 is affected. Safari before 10.1 is affected. The issue involves the "WebKit Web Inspector" component. It allows attackers to cause a denial of service (memory corruption and application crash) by leveraging a window-close action during a debugger-pause state.
https://support.apple.com/HT207617
https://support.apple.com/HT207600
https://security.gentoo.org/glsa/201706-15