CVE-2025-64505 — LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index
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 buffe…
Published: 2025-11-24 · CVSS: 6.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7