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CVE-2025-66293

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Date: 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.

Severity Score

Related Resources (9)

https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1
http://www.openwall.com/lists/oss-security/2025/12/03/8
https://nvd.nist.gov/vuln/detail/CVE-2025-66293
https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f
http://www.openwall.com/lists/oss-security/2025/12/03/6
http://www.openwall.com/lists/oss-security/2025/12/03/7
https://github.com/pnggroup/libpng/issues/764
https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a
https://www.mend.io/vulnerability-database/CVE-2025-66293

Severity Score

Weakness Type (CWE)

Out-of-bounds Read

CWE-125

Top Fix

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Upgrade Version

Upgrade to version https://github.com/pnggroup/libpng.git - v1.6.52

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): HIGH

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