ImageIO in Apple OS X before 10.11.6 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted xStride and yStride values in an EXR image.
https://support.apple.com/HT206903
https://github.com/openexr/openexr/issues/563
http://www.securitytracker.com/id/1036348
http://www.securityfocus.com/bid/91824
http://lists.apple.com/archives/security-announce/2016/Jul/msg00000.html