CVE-2025-64505 – LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index

CVE ID : CVE-2025-64505

Published : Nov. 25, 2025, 12:15 a.m. | 1 hour, 7 minutes ago

Description : 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.

Severity: 6.1 | MEDIUM

Visit the link for more details, such as CVSS details, affected products, timeline, and more…