CVE-2025-64720

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

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/08da33b4c88cfcd36e5a706558a8d7e0e4773643	Patch
https://github.com/pnggroup/libpng/issues/686	Exploit Issue Tracking
https://github.com/pnggroup/libpng/pull/751	Issue Tracking Patch
https://github.com/pnggroup/libpng/security/advisories/GHSA-hfc7-ph9c-wcww	Exploit Vendor Advisory
https://github.com/pnggroup/libpng/security/advisories/GHSA-hfc7-ph9c-wcww	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

18 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) LIBPNG es una biblioteca de referencia para su uso en aplicaciones que leen, crean y manipulan archivos de imagen ráster PNG (Portable Network Graphics). Desde la versión 1.6.0 hasta la 1.6.51, una vulnerabilidad de lectura fuera de límites existe en png_image_read_composite al procesar imágenes de paleta con PNG_FLAG_OPTIMIZE_ALPHA habilitado. El código de composición de paleta en png_init_read_transformations aplica incorrectamente la composición de fondo durante la premultiplicación, violando el invariante componente ? alfa × 257 requerido por la API PNG simplificada. Este problema ha sido parcheado en la versión 1.6.51.

Information

Published : 2025-11-25 00:15

Updated : 2026-10-18 20:10

NVD link : CVE-2025-64720

Mitre link : CVE-2025-64720

CVE.ORG link : CVE-2025-64720

JSON object : View

Products Affected

libpng

libpng

CWE

CWE-125

Out-of-bounds Read

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