CVE-2025-66293

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.

• https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1

  security-advisories@github.com Patch
• https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a

  security-advisories@github.com Patch
• https://github.com/pnggroup/libpng/issues/764

  security-advisories@github.com Exploit Issue Tracking Patch
• https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f

  security-advisories@github.com Exploit Vendor Advisory
• http://www.openwall.com/lists/oss-security/2025/12/03/6

  af854a3a-2127-422b-91ae-364da2661108 Mailing List
• http://www.openwall.com/lists/oss-security/2025/12/03/7

  af854a3a-2127-422b-91ae-364da2661108 Mailing List
• http://www.openwall.com/lists/oss-security/2025/12/03/8

  af854a3a-2127-422b-91ae-364da2661108 Mailing List
• https://github.com/pnggroup/libpng/issues/764

  134c704f-9b21-4f2e-91b3-4a467353bcc0 Exploit Issue Tracking Patch