What is CVE-2025-64505?

CVE-2025-64505 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index

Which CVE IDs does CVE-2025-64505 cover?

CVE-2025-64505 covers the following CVE IDs: CVE-2025-64505. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-64505?

CVE-2025-64505 has a CVSS v3 base score of 6.1, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-64505?

CVE-2025-64505 affects 2 products, including: azl3 libpng 1.6.40-1 on Azure Linux 3.0; cbl2 libpng 1.6.39-1 on CBL Mariner 2.0.

CVE-2025-64505MediumCVSS 6.1

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

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-64505 →

🎯 Affected products2

azl3 libpng 1.6.40-1 on Azure Linux 3.0
cbl2 libpng 1.6.39-1 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.6.51-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-64505
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade