HOMEVULNERABILITIESCVE-2025-64506
MEDIUM

CVE-2025-64506

CWE-125Published: November 25, 2025· Updated: Jun 17, 2026

6.1
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-64506 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Affected Vendors & Products

libpng1 product(s)
libpng
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821
ADVISORYhttps://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6

All References (3)

→
https://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821Patch
→
https://github.com/pnggroup/libpng/pull/749Issue Tracking
→
https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6Vendor Advisory

Quick Facts

CVE IDCVE-2025-64506
CVSS Score6.1 / 10
SeverityMEDIUM
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedNov 25, 2025

Related CVEs (CWE-125)

CVE-2021-41556
10.0
CVE-2021-21777
10.0
CVE-2013-0767
10.0
CVE-2009-2523
10.0
CVE-2017-14451
10.0
CVE-2026-34987
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2025-64506 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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