CVE-2020-12672
GraphicsMagick through 1.3.35 has a heap-based buffer overflow in ReadMNGImage in coders/png.c.
Date published : 2020-05-05
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19025
https://lists.debian.org/debian-lts-announce/2020/06/msg00004.html