ALPINE-CVE-2025-66293
Record from OSV · Published December 3, 2025
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management. Upgrade to libpng 1.6.52 or later.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| libpng | Alpine:v3.23 | 1.6.53-r0 |
| libpng | Alpine:v3.20 | 1.6.53-r0 |
| libpng | Alpine:v3.22 | 1.6.53-r0 |
| libpng | Alpine:v3.21 | 1.6.53-r0 |
| libpng | Alpine:v3.24 | 1.6.53-r0 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.23 | libpng | 1.2.39-r0, 1.6.18-r0, 1.6.5-r0 |
| Alpine:v3.20 | libpng | 1.2.37-r0, 1.2.38-r0, 1.2.39-r0 |
| Alpine:v3.22 | libpng | 1.6.27-r1, 1.2.34-r0, 1.2.35-r0 |
| Alpine:v3.21 | libpng | 0, 1.5.2-r1, 1.4.1-r1 |
| Alpine:v3.24 | libpng | 0 |
Timeline
- Dec 3, 2025 CVE Published
- Jun 15, 2026 CVE Updated
- Aug 8, 2026 Distribution Patch
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