Is CVE-2025-64506 in the CISA KEV catalog?

No. CVE-2025-64506 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-64506?

CVE-2025-64506 has a CVSS v3 base score of 6.1 (Moderate).

What is the EPSS score for CVE-2025-64506?

CVE-2025-64506 has an EPSS score of 0.12% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-64506?

Upgrade libpng1.6 on debian 11 to 1.6.37-3+deb11u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2025-64506

MEDIUM

6.1

CVSS v3

NVD

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.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

libpng1.6Debian

Fixed in:1.6.37-3+deb11u1CVE-2025-64506

Fixed in:1.6.39-2+deb12u1CVE-2025-64506

Fixed in:1.6.48-1+deb13u1CVE-2025-64506

Fixed in:1.6.51-1CVE-2025-64506

libpng1.6Ubuntu

Fixed in:1.6.20-2ubuntu0.1~esm2USN-7924-1

Fixed in:1.6.34-1ubuntu0.18.04.2+esm1USN-7924-1

Fixed in:1.6.37-2ubuntu0.1~esm1USN-7924-1

Fixed in:1.6.37-3ubuntu0.1USN-7924-1

Fixed in:1.6.43-5ubuntu0.1USN-7924-1

Fixed in:1.6.50-1ubuntu0.1USN-7924-1

libpng16-16Ubuntu

Fixed in:1.6.20-2ubuntu0.1~esm2USN-7924-1

Fixed in:1.6.34-1ubuntu0.18.04.2+esm1USN-7924-1

Fixed in:1.6.37-2ubuntu0.1~esm1USN-7924-1

Fixed in:1.6.37-3ubuntu0.1USN-7924-1

libpng16-16t64Ubuntu

Fixed in:1.6.43-5ubuntu0.1USN-7924-1

Fixed in:1.6.50-1ubuntu0.1USN-7924-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

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

Exploit Intelligence

0.12%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Issue Tracking1

github.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-26.