The SpliceImage function in MagickCore/transform.c in ImageMagick before 6.9.2-4 allows remote attackers to cause a denial of service (application crash) via a crafted png file.
https://github.com/ImageMagick/ImageMagick/commit/7b1cf5784b5bcd85aa9293ecf56769f68c037231
https://access.redhat.com/errata/RHSA-2016:1237
http://www.securityfocus.com/bid/91030
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.openwall.com/lists/oss-security/2016/06/02/13
http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=28466