magick/memory.c in ImageMagick before 6.9.4-5 allows remote attackers to cause a denial of service (application crash) via vectors involving "too many exceptions," which trigger a buffer overflow.
https://github.com/ImageMagick/ImageMagick/commit/0474237508f39c4f783208123431815f1ededb76
https://bugzilla.redhat.com/show_bug.cgi?id=1410494