Fedora 43 libpng Medium Buffer Over-Read Advisories 2026

The libpng package contains a library of functions for creating and manipulating PNG (Portable Network Graphics) image format files. PNG is a bit-mapped graphics format similar to the GIF format. PNG was created to replace the GIF format, since GIF uses a patented data compression algorithm. Libpng should be installed if you need to manipulate PNG format image files. Update Information : Version 1.6.54 [January 12, 2026] Fixed CVE-2026-22695 (medium severity): Heap buffer over-read in png_image_read_direct_scaled. Fixed CVE-2026-22801 (medium severity): Integer truncation causing heap buffer over-read in png_image_write_*. Version 1.6.55 [February 9, 2026] Fixed CVE-2026-25646 (high severity): Heap buffer overflow in png_set_quantize.

The libpng package contains a library of functions for creating and

manipulating PNG (Portable Network Graphics) image format files. PNG

is a bit-mapped graphics format similar to the GIF format. PNG was

created to replace the GIF format, since GIF uses a patented data

compression algorithm.

Libpng should be installed if you need to manipulate PNG format image

Version 1.6.54 [January 12, 2026] Fixed CVE-2026-22695 (medium severity): Heap buffer over-read in png_image_read_direct_scaled. Fixed CVE-2026-22801 (medium severity): Integer truncation causing heap buffer over-read in png_image_write_*. Version 1.6.55 [February 9, 2026] Fixed CVE-2026-25646 (high severity): Heap buffer overflow in png_set_quantize.

* Fri Feb 13 2026 Michal Hlavinka - 2:1.6.55-1 - updated to 1.6.55 (#2429529) * Wed Feb 11 2026 Michal Hlavinka - 2:1.6.54-1 - updated to 1.6.54 * Fri Jan 16 2026 Fedora Release Engineering - 2:1.6.53-2 - Rebuilt for

* Fri Feb 13 2026 Michal Hlavinka - 2:1.6.55-1 - updated to 1.6.55 (#2429529) * Wed Feb 11 2026 Michal Hlavinka - 2:1.6.54-1 - updated to 1.6.54 * Fri Jan 16 2026 Fedora Release Engineering - 2:1.6.53-2 - Rebuilt for

[ 1 ] Bug #2437248 - CVE-2026-22801 libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API [fedora-43] [ 2 ] Bug #2438669 - CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-42] [ 3 ] Bug #2438681 - CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-43]

[ 1 ] Bug #2437248 - CVE-2026-22801 libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API [fedora-43] [ 2 ] Bug #2438669 - CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-42] [ 3 ] Bug #2438681 - CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-43]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-a9ae661fa2' at the command line. For more information, refer to the dnf documentation available at

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-a9ae661fa2' at the command line. For more information, refer to the dnf documentation available at