A segment fault (SEGV) flaw was found in libtiff that could be triggered by passing a crafted tiff file to the TIFFReadRGBATileExt() API. This flaw allows a remote attacker to cause a heap-buffer overflow, leading to a denial of service.
https://support.apple.com/en-us/HT214118
https://gitlab.com/libtiff/libtiff/-/merge_requests/546
https://gitlab.com/libtiff/libtiff/-/issues/622
https://bugzilla.redhat.com/show_bug.cgi?id=2251344