Packages
- libpng1.6 - PNG (Portable Network Graphics) file library
Details
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...
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)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.10 questing | libpng16-16t64 – 1.6.50-1ubuntu0.3 | ||
| 25.04 plucky | libpng16-16t64 – 1.6.47-1.1ubuntu0.3 | ||
| 24.04 LTS noble | libpng16-16t64 – 1.6.43-5ubuntu0.3 | ||
| 22.04 LTS jammy | libpng16-16 – 1.6.37-3ubuntu0.3 | ||
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