The History implementation in WebKit in Apple iOS before 9.3, Safari before 9.1, and tvOS before 9.2 allows remote attackers to cause a denial of service (resource consumption and application crash) via a crafted web site.
https://support.apple.com/HT206171
https://support.apple.com/HT206169
https://support.apple.com/HT206166
http://www.securitytracker.com/id/1035353
http://lists.apple.com/archives/security-announce/2016/Mar/msg00005.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00002.html
http://lists.apple.com/archives/security-announce/2016/Mar/msg00000.html