CVE-2025-66293: fallo de gravedad alta en pnggroup libpng
LIBPNG has an out-of-bounds read in png_image_read_composite
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.1epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Productos afectados
pnggroup · libpngCVEs relacionadas — pnggroup libpng
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-25646HIGHLIBPNG has a heap buffer overflow in png_set_quantizeEPSS 1.1%CVE-2026-33416HIGHLIBPNG has use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE`EPSS 1.1%CVE-2026-33636HIGHLIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64EPSS 0.8%CVE-2025-64720HIGHLIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplicationEPSS 0.4%CVE-2025-65018HIGHLIBPNG is vulnerable to a heap buffer overflow in `png_combine_row` triggered via `png_image_finish_read`EPSS 0.3%CVE-2026-22695MEDIUMLIBPNG has a heap buffer over-read in png_image_read_direct_scaled (regression from CVE-2025-65018 fix)EPSS 0.2%
Referencias
https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484ahttps://github.com/pnggroup/libpng/issues/764https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4fhttp://www.openwall.com/lists/oss-security/2025/12/03/6http://www.openwall.com/lists/oss-security/2025/12/03/7http://www.openwall.com/lists/oss-security/2025/12/03/8