CoreText in Apple iOS before 8.4 and OS X before 10.10.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted text file, a different vulnerability than CVE-2015-3685, CVE-2015-3686, CVE-2015-3687, and CVE-2015-3689.
http://lists.apple.com/archives/security-announce/2015/Jun/msg00001.html
http://lists.apple.com/archives/security-announce/2015/Jun/msg00002.html
http://lists.apple.com/archives/security-announce/2015/Sep/msg00003.html
https://support.apple.com/HT205221
http://support.apple.com/kb/HT204941