USN-7963-1: libpng vulnerabilities

It was discovered that the libpng simplified API incorrectly processed
palette PNG images with partial transparency and gamma correction. If a
user or automated system were tricked into opening a specially crafted PNG
file, an attacker could use this issue to cause libpng to crash, resulting
in a denial of service. (CVE-2025-66293)

Petr Simecek, Stanislav Fort and Pavel Kohout discovered that the libpng
simplified API incorrectly processed interlaced 16-bit PNGs with 8-bit
output format and non-minimal row strides. If a user or automated system
were tricked into opening a specially crafted PNG file, an attacker could
use this issue to cause libpng to crash, resulting in a denial of service.
(CVE-2026-22695)

Cosmin Truta discovered that the libpng simplified API incorrectly handled
invalid row strides. If a user or automated system were tricked into
opening a specially crafted PNG file, an attacker could use this issue to
cause libpng to crash, resulting in a denial of service. (CVE-2026-22801)