There is an out-of-bounds read in Exiv2::MrwImage::readMetadata in mrwimage.cpp in Exiv2 through 0.27.2.
https://github.com/Exiv2/exiv2/pull/943
https://lists.debian.org/debian-lts-announce/2019/07/msg00015.html
https://lists.debian.org/debian-lts-announce/2023/01/msg00004.html