---
cve: "CVE-2025-64720"
severity: "HIGH"
cvss: 7.1
epss: "42%"
vendor: "pnggroup"
kev: false
exploited: false
published: "2025-11-25 00:15:47"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T15:29:30+02:00"
---

# CVE-2025-64720

> 7.1 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 49363adcfaf098748d7a4c8c624ad8c45a8c3a86 (Commit)
- 08da33b4c88cfcd36e5a706558a8d7e0e4773643 (Commit)

## Referenzen

- <https://github.com/pnggroup/libpng/security/advisories/GHSA-hfc7-ph9c-wcww>
- <https://github.com/pnggroup/libpng/issues/686>
- <https://github.com/pnggroup/libpng/pull/751>
- <https://github.com/pnggroup/libpng/commit/08da33b4c88cfcd36e5a706558a8d7e0e4773643>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-64720) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_