What is CVE-2026-18917?

CVE-2026-18917 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow

Which CVE IDs does CVE-2026-18917 cover?

CVE-2026-18917 covers the following CVE IDs: CVE-2026-18917. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-18917?

CVE-2026-18917 has a CVSS v3 base score of 6.6, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-18917?

CVE-2026-18917 affects 2 products, including: azl3 libvirt 10.10.0-2 on Azure Linux 3.0; azl3 libvirt 11.9.0-1 on Azure Linux 3.0.

CVE-2026-18917MediumCVSS 6.6

Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow

Vendor

Microsoft Security Response Center (MSRC)

Published

August 25, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-18917 →

🎯 Affected products2

azl3 libvirt 10.10.0-2 on Azure Linux 3.0
azl3 libvirt 11.9.0-1 on Azure Linux 3.0

✅ Remediation

Security Update — fixed build 11.9.0-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-18917
patchhttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade