CRITICAL 9.8 Microsoft
CVE-2026-68166
userfaultfd: prevent registration of special VMAs
Microsoft Security Update 2026-Aug: userfaultfd: prevent registration of special VMAs
Affected Products
- azl3 kernel 6.6.152.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.150.1-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68166
- https://nvd.nist.gov/vuln/detail/CVE-2026-68166
This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-08-11 via Microsoft. Affected: azl3 kernel 6.6.152.1-1 on Azure Linux 3.0, azl3 kernel 6.6.150.1-1 on Azure Linux 3.0.
Risk Timeline
CVE Disclosed2026-08-11 · 88 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68166NVD / MITRE
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