# CVE-2025-64505

## Summary

- **CVE ID:** CVE-2025-64505
- **Severity:** MEDIUM
- **CVSS Score:** 6.1 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H)
- **CWE:** CWE-125
- **Published:** Nov 24, 2025
- **Last Modified:** Sep 14, 2026

## Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. This issue has been patched in version 1.6.51.

## Affected Products

- pnggroup — libpng (< 1.6.51)

## References

- [CNA](https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42)
- [CNA](https://github.com/pnggroup/libpng/pull/748)
- [CNA](https://github.com/pnggroup/libpng/commit/6a528eb5fd0dd7f6de1c39d30de0e41473431c37)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.19%
- **EPSS Percentile:** 9.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._