What is CVE-2026-27211?

CVE-2026-27211 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Cloud Hypervisor: Host File Exfiltration via QCOW Backing File Abuse

Which CVE IDs does CVE-2026-27211 cover?

CVE-2026-27211 covers the following CVE IDs: CVE-2026-27211. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-27211?

CVE-2026-27211 has a CVSS v3 base score of 10.0, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-27211?

CVE-2026-27211 affects 2 products, including: azl3 cloud-hypervisor 48.0.246-1 on Azure Linux 3.0; cbl2 cloud-hypervisor-cvm 38.0.72.2-5 on CBL Mariner 2.0.

CVE-2026-27211CriticalCVSS 10.0

Cloud Hypervisor: Host File Exfiltration via QCOW Backing File Abuse

Vendor

Microsoft Security Response Center (MSRC)

Published

February 25, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-27211 →

🎯 Affected products2

azl3 cloud-hypervisor 48.0.246-1 on Azure Linux 3.0
cbl2 cloud-hypervisor-cvm 38.0.72.2-5 on CBL Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 48.0.246-2

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27211
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade