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.
References
| Link | Resource |
|---|---|
| https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821 | Patch |
| https://github.com/pnggroup/libpng/pull/749 | Issue Tracking |
| https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6 | Vendor Advisory |
Configurations
History
26 Nov 2025, 18:34
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Libpng libpng
Libpng |
|
| CPE | cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:* | |
| References | () https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821 - Patch | |
| References | () https://github.com/pnggroup/libpng/pull/749 - Issue Tracking | |
| References | () https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6 - Vendor Advisory |
25 Nov 2025, 00:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-11-25 00:15
Updated : 2025-11-26 18:34
NVD link : CVE-2025-64506
Mitre link : CVE-2025-64506
CVE.ORG link : CVE-2025-64506
JSON object : View
Products Affected
libpng
- libpng
CWE
CWE-125
Out-of-bounds Read
