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CVE-2025-64505

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

Published: Nov 24, 2025Updated: Nov 26, 2025 Sources: CVE List NVD BDUCWE-125
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.2%
Top 92.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:LI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-125

Affected Products

libpngpnggroup
Library
OSS Libraries / generic-library
libpnglibpng
Library
OSS Libraries / generic-library
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
РОСА ХРОМАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
AndroidGoogle Inc
EmbeddedOS
Operating Systems / mobile-os
pnggrouposs-projectOSS Librariesaka libpng
libpngoss-projectOSS Librariesaka libpng project, pngcheck (related tool)
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нтц ит роса»commercialRUOperating Systems
google inccommercialUSMobile Appsaka google
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42
github.com
https://github.com/pnggroup/libpng/pull/748
github.com
https://github.com/pnggroup/libpng/commit/6a528eb5fd0dd7f6de1c39d30de0e41473431c37
github.com
and 11 more references View all →

Timeline

Published
Nov 24, 2025
Last Updated
Nov 26, 2025

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