What is CVE-2026-81563?

CVE-2026-81563 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. SVCB AliasMode additional-data error leaks qpcache references

Which CVE IDs does CVE-2026-81563 cover?

CVE-2026-81563 covers the following CVE IDs: CVE-2026-81563. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-81563?

CVE-2026-81563 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-81563?

CVE-2026-81563 affects 1 product, including: azl3 bind 9.20.26-1 on Azure Linux 3.0.

CVE-2026-81563HighCVSS 7.5

SVCB AliasMode additional-data error leaks qpcache references

Vendor

Microsoft Security Response Center (MSRC)

Published

September 21, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-81563 →

🎯 Affected products1

azl3 bind 9.20.26-1 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81563
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade