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CVE-2026-99176VulnerabilityPublished

Microsoft · KVM: nVMX: Reset MMU back to the root MMU if loading L2 state fails for !VM-Entry

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99176· Medium

Not known to be exploited · fixed in d00d5f534a8238674755e59826a6c7d3c8efb870 : update Microsoft when convenient.

Data as of 29 Oct 2026, 11:35 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in d00d5f534a8238674755e59826a6c7d3c8efb870, c9716f956216eb74ab0aad7f633586edd49e0322, c8f4cfe1cf93bce924e27f2abead7a4c4a487505

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Linux to d00d5f534a8238674755e59826a6c7d3c8efb870, c9716f956216eb74ab0aad7f633586edd49e0322 or c8f4cfe1cf93bce924e27f2abead7a4c4a487505.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778, < d00d5f534a8238674755e59826a6c7d3c8efb870
Fixed in
  • d00d5f534a8238674755e59826a6c7d3c8efb870
LinuxLinuxAffected
  • ≥ 72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778, < c9716f956216eb74ab0aad7f633586edd49e0322
Fixed in
  • c9716f956216eb74ab0aad7f633586edd49e0322
LinuxLinuxAffected
  • ≥ 72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778, < c8f4cfe1cf93bce924e27f2abead7a4c4a487505
Fixed in
  • c8f4cfe1cf93bce924e27f2abead7a4c4a487505
LinuxLinuxAffected
  • =4.15
Fixed in–
Debiandebian/linuxpkg:deb/debian/linuxOther threatsAffected
  • =4.15
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

This vulnerability involves the KVM nVMX component where the MMU is not properly reset back to the root MMU if loading the L2 state fails for non-VM-Entry conditions. It affects Microsoft product version 3.0. No CVSS score or detailed impact information is provided.

References

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