CVE-2025-64720 — LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplication
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, …
Published: 2025-11-24 · CVSS: 7.1 · CVSS 3.1
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7