What is CVE-2026-43490?

CVE-2026-43490 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. ksmbd: validate inherited ACE SID length

Which CVE IDs does CVE-2026-43490 cover?

CVE-2026-43490 covers the following CVE IDs: CVE-2026-43490. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-43490?

CVE-2026-43490 has a CVSS v3 base score of 8.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-43490?

CVE-2026-43490 affects 2 products, including: azl3 kernel 6.6.138.1-1 on Azure Linux 3.0; azl3 kernel 6.6.139.1-1 on Azure Linux 3.0.

CVE-2026-43490HighCVSS 8.8

ksmbd: validate inherited ACE SID length

Vendor

Microsoft Security Response Center (MSRC)

Published

May 22, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-43490 →

🎯 Affected products2

azl3 kernel 6.6.138.1-1 on Azure Linux 3.0
azl3 kernel 6.6.139.1-1 on Azure Linux 3.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43490