In ImageMagick 7.0.6-8, a memory leak vulnerability was found in the function ReadMIFFImage in coders/miff.c, which allows attackers to cause a denial of service (memory consumption in NewLinkedList in MagickCore/linked-list.c) via a crafted file.
https://usn.ubuntu.com/3681-1/
https://security.gentoo.org/glsa/201711-07