In ImageMagick 7.0.8-13 Q16, there is a heap-based buffer over-read in the EncodeImage function of coders/pict.c, which allows attackers to cause a denial of service via a crafted SVG image file.
https://usn.ubuntu.com/4034-1/
https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html
https://lists.debian.org/debian-lts-announce/2018/11/msg00014.html