Fedora 44 libpng12 Critical Heap Buffer Overflow CVE-2026-25646 Advisory
fedora
April 25, 2026
fix CVE-2026-25646: heap buffer overflow in png_set_quantize
Summary
The libpng12 package provides libpng 1.2, an older version of the libpng
library for manipulating PNG (Portable Network Graphics) image format files.
This version should be used only if you are unable to use the current
version of libpng.
Update Information:
fix CVE-2026-25646: heap buffer overflow in png_set_quantize
Topics Covered
Change Log
* Wed Apr 1 2026 Michal Hlavinka
References
[ 1 ] Bug #2438670 - CVE-2026-25646 libpng12: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-42]
https://bugzilla.redhat.com/show_bug.cgi?id=2438670
[ 2 ] Bug #2438682 - CVE-2026-25646 libpng12: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-43]
https://bugzilla.redhat.com/show_bug.cgi?id=2438682
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-3adf4e38cb' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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Name: libpng12
Product: Fedora 44
Version: 1.2.57
Release: 25.fc44
Summary: Old version of libpng, needed to run old binaries
Topics Covered
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