CVE-2025-64506
LIBPNG is vulnerable to a heap buffer over-read in `png_write_image_8bit` with grayscale+alpha or RGB/RGBA images
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, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.
INFO
Published Date :
Nov. 25, 2025, 12:15 a.m.
Last Modified :
Nov. 26, 2025, 6:34 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update libpng to version 1.6.51.
- Apply the patch for libpng version 1.6.51.
- Recompile applications using the updated libpng library.
Public PoC/Exploit Available at Github
CVE-2025-64506 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-64506.
| URL | Resource |
|---|---|
| https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821 | Patch |
| https://github.com/pnggroup/libpng/pull/749 | Issue Tracking |
| https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-64506 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-64506
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Shell Python CMake Makefile C Assembly M4 DIGITAL Command Language Dockerfile C++
None
Shell Python CMake Makefile C Assembly M4 DIGITAL Command Language Dockerfile C++
None
Shell Python CMake Makefile C Assembly M4 DIGITAL Command Language Dockerfile C++
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-64506 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-64506 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Nov. 26, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:* versions from (including) 1.6.0 up to (excluding) 1.6.51 Added Reference Type GitHub, Inc.: https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/pnggroup/libpng/pull/749 Types: Issue Tracking Added Reference Type GitHub, Inc.: https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6 Types: Vendor Advisory -
New CVE Received by [email protected]
Nov. 25, 2025
Action Type Old Value New Value Added 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, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H Added CWE CWE-125 Added Reference https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821 Added Reference https://github.com/pnggroup/libpng/pull/749 Added Reference https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6