libtiff's tiffcrop utility has a uint32_t underflow that can lead to out of bounds read and write. An attacker who supplies a crafted file to tiffcrop (likely via tricking a user to run tiffcrop on it with certain parameters) could cause a crash or in some cases, further exploitation.
https://www.debian.org/security/2023/dsa-5333
https://lists.debian.org/debian-lts-announce/2023/01/msg00018.html