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HIGH

CVE-2025-66293

CVSS v3

7.1

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libpngAlmaLinux:10all versions · fixed in 2:1.6.40-8.el10_1.1and 1 other package
  • libpngAlmaLinux:9all versions · fixed in 2:1.6.37-12.el9_7.1and 1 other package
  • libpngAlmaLinux:8all versions · fixed in 2:1.6.34-9.el8_10and 1 other package
  • mingw32-libpngAlmaLinux:8all versions · fixed in 1.6.34-1.el8_10and 3 other packages

Vendor advisories

  • CVE-2025-66293 Red Hat Product Security531 products fixed · 4 known affected

    libpng: LIBPNG out-of-bounds read in png_image_read_composite

    libpng as a component of Red Hat Enterprise Linux 6 · libpng-devel as a component of Red Hat Enterprise Linux 6 · libpng-static as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:80330 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

  • RHSA-2026:9255 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenJDK 11.0.31 ELS Security Update for Portable Linux Builds

  • RHSA-2026:6732 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

  • RHBA-2026:6267 Red Hat Product Security1 product fixed

    Red Hat Bug Fix Advisory: OpenJDK 25 FIPS Update for Portable Linux Builds

  • RHSA-2026:4419 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.62 bug fix and security update

21 more advisories

Full record on NVD

Description

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.

Technical details

Published
2025-12-03

Frequently asked questions

What is 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.

Is CVE-2025-66293 actively exploited?

Active exploitation of CVE-2025-66293 has not been confirmed. Its EPSS score was 0.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-66293?

CVE-2025-66293 has a CVSS v3 base score of 7.1 (HIGH severity).

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