USN-8039-1: libpng vulnerability

Publication date

12 February 2026

Overview

libpng could be made to crash if it opened a specially crafted file.


Packages

  • libpng1.6 - PNG (Portable Network Graphics) file library

Details

It was discovered that the libpng simplified API incorrectly handled
quantizing RGB images. 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.

It was discovered that the libpng simplified API incorrectly handled
quantizing RGB images. 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.

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 –  1.6.50-1ubuntu0.4
24.04 LTS noble libpng16-16t64 –  1.6.43-5ubuntu0.5
22.04 LTS jammy libpng16-16 –  1.6.37-3ubuntu0.4

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