libc in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1 allows local users to gain privileges or cause a denial of service (memory corruption) via unspecified vectors.
lists.apple.com/archives/security-announce/2016/May/msg00001.html
lists.apple.com/archives/security-announce/2016/May/msg00002.html
lists.apple.com/archives/security-announce/2016/May/msg00003.html
lists.apple.com/archives/security-announce/2016/May/msg00004.html
www.securityfocus.com/bid/90691
www.securitytracker.com/id/1035890
support.apple.com/HT206564
support.apple.com/HT206566
support.apple.com/HT206567
support.apple.com/HT206568