In OpenEXR 2.2.0, a crafted image causes a heap-based buffer over-read in the hufDecode function in IlmImf/ImfHuf.cpp during exrmaketiled execution; it may result in denial of service or possibly unspecified other impact.
https://usn.ubuntu.com/4148-1/
https://lists.debian.org/debian-lts-announce/2020/08/msg00056.html