CVE-2025-64506

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1 (hide)

cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:*

History

No history.

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

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