CVE-2025-64505

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. 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/6a528eb5fd0dd7f6de1c39d30de0e41473431c37	Patch
https://github.com/pnggroup/libpng/pull/748	Issue Tracking
https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42	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). Versiones anteriores a la versión 1.6.51, existe una vulnerabilidad de lectura excesiva del búfer de pila en la función png_do_quantize de libpng al procesar archivos PNG con índices de paleta malformados. La vulnerabilidad ocurre cuando los límites del array palette_lookup no se validan contra datos de imagen suministrados externamente, permitiendo a un atacante crear un archivo PNG con índices de paleta fuera de rango que desencadenan un acceso a memoria fuera de límites. 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-2025-64505

Mitre link : CVE-2025-64505

CVE.ORG link : CVE-2025-64505

JSON object : View

Products Affected

libpng

libpng

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2025-64505", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-64505", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-11-25T18:55:44.084881Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 4.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "pnggroup", "product": "libpng", "versions": [{"status": "affected", "version": "< 1.6.51"}]}]}], "published": "2025-11-25T00:15:47.133", "references": [{"url": "https://github.com/pnggroup/libpng/commit/6a528eb5fd0dd7f6de1c39d30de0e41473431c37", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/pnggroup/libpng/pull/748", "tags": ["Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. This issue has been patched in version 1.6.51."}, {"lang": "es", "value": "LIBPNG es una biblioteca de referencia para su uso en aplicaciones que leen, crean y manipulan archivos de imagen r\u00e1ster PNG (Portable Network Graphics). Versiones anteriores a la versi\u00f3n 1.6.51, existe una vulnerabilidad de lectura excesiva del b\u00fafer de pila en la funci\u00f3n png_do_quantize de libpng al procesar archivos PNG con \u00edndices de paleta malformados. La vulnerabilidad ocurre cuando los l\u00edmites del array palette_lookup no se validan contra datos de imagen suministrados externamente, permitiendo a un atacante crear un archivo PNG con \u00edndices de paleta fuera de rango que desencadenan un acceso a memoria fuera de l\u00edmites. Este problema ha sido parcheado en la versi\u00f3n 1.6.51."}], "lastModified": "2026-10-18T20:10:00.110", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A8B5D980-7DA8-4291-8723-4CDDF73B19F6", "versionEndExcluding": "1.6.51"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}