A heap-based buffer overflow flaw was found in libtiff in the handling of TIFF images in libtiff's TIFF2PDF tool. A specially crafted TIFF file can lead to arbitrary code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
https://www.debian.org/security/2021/dsa-4869
https://security.netapp.com/advisory/ntap-20210521-0009/
https://security.gentoo.org/glsa/202104-06
https://lists.debian.org/debian-lts-announce/2021/06/msg00023.html
https://gitlab.com/rzkn/libtiff/-/commit/7be2e452ddcf6d7abca88f41d3761e6edab72b22