🛡️ CVE-2025-64720 — libpng

🟠 CVSS 7.1 — High ⚠️ Exploit Public CWE-125 NVD
7.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability high.

Weakness class

CVE-2025-64720 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2025-64720 is recorded against 2 packages.

  • libpng (from 1.6.0 up to 1.6.51)
  • platform/external/libpng (from 14:0 up to 14:2026-06-01)

Timeline and source

Published on 25 November 2025 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
github.com
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github.com
github.com

CVE-2025-64720 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CWE CWE-125
Public Exploit ⚠️ Yes
Source NVD
Published 2025-11-25
Updated 2026-08-12
Modified 2026-06-17

Affected Packages

Software From version Fixed in
libpng 1.6.0 1.6.51
platform/external/libpng 14:0 14:2026-06-01

Similar Threats

Exploit Protection

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