The ReadMATImageV4 function in coders/mat.c in ImageMagick 7.0.8-7 uses an uninitialized variable, leading to memory corruption.
https://usn.ubuntu.com/3785-1/
https://lists.debian.org/debian-lts-announce/2020/08/msg00030.html
https://github.com/ImageMagick/ImageMagick/issues/1221
Source: Mitre, NVD
Published: 2018-07-23
Updated: 2020-08-24
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical