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VulnerabilityPublished

CVE-2026-99176: Linux kernel · KVM: nVMX: Reset MMU back to the root MMU if loading L2 state fails for !VM-Entry

Source GCVE Database

0
Authoritative record:CVE-2026-99176

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

Data as of 28 Oct 2026, 13:47 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

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. Weaponised: 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 26 Oct 2026.

What to do

Upgrade Linux kernel 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.

AI-suggested

A fix has been implemented in the Linux kernel to reset the MMU pointer back to the root MMU if loading the L2 state fails for non-VM-Entry cases. Users should apply the relevant kernel updates containing this fix once available. Patch status is not explicitly confirmed in the provided data; check the vendor advisory for current remediation guidance.

Description

A vulnerability in the Linux kernel's KVM nVMX module could cause a kernel NULL pointer dereference when the MMU pointer is not reset properly after a failure loading L2 state for non-VM-Entry cases. This can lead to a kernel crash (oops) due to dereferencing freed nested MMU state.

References

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