What is CVE-2026-78227?

CVE-2026-78227 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Use-after-free in DoQ stream output buffer on reset re-transmission

Which CVE IDs does CVE-2026-78227 cover?

CVE-2026-78227 covers the following CVE IDs: CVE-2026-78227. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-78227?

CVE-2026-78227 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-78227?

CVE-2026-78227 affects 1 product, including: azl3 unbound 1.26.0-1 on Azure Linux 3.0.

CVE-2026-78227MediumCVSS 6.5

Use-after-free in DoQ stream output buffer on reset re-transmission

Vendor

Microsoft Security Response Center (MSRC)

Published

September 17, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-78227 →

🎯 Affected products1

azl3 unbound 1.26.0-1 on Azure Linux 3.0

✅ Remediation

Security Update — fixed build 1.26.1-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78227
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade