An issue was discovered in libexif before 0.6.22. Use of uninitialized memory in EXIF Makernote handling could lead to crashes and potential use-after-free conditions.
https://usn.ubuntu.com/4396-1/
https://security.gentoo.org/glsa/202007-05
https://lists.debian.org/debian-lts-announce/2020/05/msg00025.html
https://github.com/libexif/libexif/commit/ec412aa4583ad71ecabb967d3c77162760169d1f
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00017.html