CVE-2025-64720
Description
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.
How to fix
- libpng libpng1.6.51 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libpng libpng | 1.6.0 ≤ v < 1.6.51 | 1.6.51 |
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