VDB
ALPINE-CVE-2025-64506
ALPINE-CVE-2025-64506
PUBLISHED
CVSS 6.099999904632568 MEDIUM
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, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.
Risk Scores
CVSS v3.1
6.099999904632568
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.22 | libpng | 1.6.38-r0, 1.6.39-r2, 1.6.39-r3 |
| Alpine:v3.20 | libpng | 1.6.26-r0, 1.4.1-r0, 1.2.35-r0 |
| Alpine:v3.21 | libpng | 1.6.34-r1, 1.2.34-r0, 1.2.35-r0 |
| Alpine:v3.23 | libpng | 0, 1.2.35-r0, 1.2.36-r0 |
Timeline
- Nov 25, 2025 CVE Published
- Dec 8, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch