In Exiv2 0.26, Exiv2::PsdImage::readMetadata in psdimage.cpp in the PSD image reader may suffer from a denial of service (infinite loop) caused by an integer overflow via a crafted PSD image file.
lists.opensuse.org/opensuse-security-announce/2020-04/msg00009.html
access.redhat.com/errata/RHSA-2019:2101
github.com/Exiv2/exiv2/issues/426
github.com/Exiv2/exiv2/pull/518
lists.debian.org/debian-lts-announce/2019/02/msg00038.html
lists.debian.org/debian-lts-announce/2023/01/msg00004.html
usn.ubuntu.com/4056-1/