An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. Safari before 10.1.1 is affected. The issue involves the "Safari" component. It allows remote attackers to cause a denial of service (application crash) via a crafted web site that improperly interacts with the history menu.
https://support.apple.com/HT207804
https://support.apple.com/HT207798