CVE-2025-64505

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. This issue has been patched in version 1.6.51.

Affected products

Alt Linux, Debian, Libpng, Linuxmint, Apple Macos, Red Os, Suse, Ubuntu

Libpng

< 1.6.51

Fix

Available

CVSS 3.1

6.1 MEDIUM

EPSS

0.2% (9th percentile)

Weakness

CWE-125

NVD status

Analyzed

Published

2025-11-24