What is CVE-2026-98309?

CVE-2026-98309 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. drm/vc4: Use managed KMS polling to fix UAF on unbind

Which CVE IDs does CVE-2026-98309 cover?

CVE-2026-98309 covers the following CVE IDs: CVE-2026-98309. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-98309?

CVE-2026-98309 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-98309?

CVE-2026-98309 affects 1 product, including: azl3 kernel 6.6.157.1-1 on Azure Linux 3.0.

CVE-2026-98309HighCVSS 7.8

drm/vc4: Use managed KMS polling to fix UAF on unbind

Vendor

Microsoft Security Response Center (MSRC)

Published

October 7, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-98309 →

🎯 Affected products1

azl3 kernel 6.6.157.1-1 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update) — fixed build 6.6.158.1-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98309
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade