What is CVE-2026-64391?

CVE-2026-64391 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. ksmbd: use opener credentials for ADS I/O

Which CVE IDs does CVE-2026-64391 cover?

CVE-2026-64391 covers the following CVE IDs: CVE-2026-64391. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-64391?

CVE-2026-64391 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-64391?

CVE-2026-64391 affects 1 product, including: azl3 kernel 6.6.144.1-1 on Azure Linux 3.0.

CVE-2026-64391HighCVSS 7.8

ksmbd: use opener credentials for ADS I/O

Vendor

Microsoft Security Response Center (MSRC)

Published

July 27, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-64391 →

🎯 Affected products1

azl3 kernel 6.6.144.1-1 on Azure Linux 3.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64391