WebKit, as used in Apple iOS before 8.3, Apple TV before 7.2, and Apple Safari before 6.2.5, 7.x before 7.1.5, and 8.x before 8.0.5, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site, a different vulnerability than other WebKit CVEs listed in APPLE-SA-2015-04-08-1, APPLE-SA-2015-04-08-3, and APPLE-SA-2015-04-08-4.
https://support.apple.com/kb/HT204949
https://support.apple.com/HT204662
https://support.apple.com/HT204661
https://support.apple.com/HT204658
http://www.securitytracker.com/id/1032047
http://www.securityfocus.com/bid/73972
http://lists.apple.com/archives/security-announce/2015/Jun/msg00006.html
http://lists.apple.com/archives/security-announce/2015/Apr/msg00003.html
http://lists.apple.com/archives/security-announce/2015/Apr/msg00002.html
http://lists.apple.com/archives/security-announce/2015/Apr/msg00000.html