CVE-2025-64505

LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index

Description

In png_init_read_transformations of pngrtran.c, there is a possible way to cause a persistent denial of service due to a heap buffer overflow. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.

Patch Available

Fix available through Seal Security.  
No upgrade required, protect your application instantly.

Fix without upgrading

Score

6.1

Severity

Medium

Ecosystem

APT

Publish Date

May 31, 2026

Modified Date

June 15, 2026

Score Vector

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

Affected Versions