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

CVE record · `CVE-2026-99176`

- **Identifiers:** `CVE-2026-99176`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 28 Oct 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before c2586874605ec23b611c57fe71d183d98f168971` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before c611337aee17a0627e365e58e2b6e78803fb3c36` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before df4d01be5b318024bec68654c7af0ebc0e0ed8a1` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before 6a36b05fc5b3d660fcc826133dc92e2fc87bd1de` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before f0c077c36fda9d498db39199e3997860e985efc8` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before d00d5f534a8238674755e59826a6c7d3c8efb870` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before c9716f956216eb74ab0aad7f633586edd49e0322` (git)
  - affected: `72e9cbdb43384ceacc49e2fb6b8c8fb7c5988778 to before c8f4cfe1cf93bce924e27f2abead7a4c4a487505` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.15`
  - unaffected: `before 4.15` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0020, the 10th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 28 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-99176](https://www.cve.org/CVERecord?id=CVE-2026-99176)
- [NVD: CVE-2026-99176](https://nvd.nist.gov/vuln/detail/CVE-2026-99176)

### References from the CNA

- <https://git.kernel.org/stable/c/c2586874605ec23b611c57fe71d183d98f168971>
- <https://git.kernel.org/stable/c/c611337aee17a0627e365e58e2b6e78803fb3c36>
- <https://git.kernel.org/stable/c/df4d01be5b318024bec68654c7af0ebc0e0ed8a1>
- <https://git.kernel.org/stable/c/6a36b05fc5b3d660fcc826133dc92e2fc87bd1de>
- <https://git.kernel.org/stable/c/f0c077c36fda9d498db39199e3997860e985efc8>
- <https://git.kernel.org/stable/c/d00d5f534a8238674755e59826a6c7d3c8efb870>
- <https://git.kernel.org/stable/c/c9716f956216eb74ab0aad7f633586edd49e0322>
- <https://git.kernel.org/stable/c/c8f4cfe1cf93bce924e27f2abead7a4c4a487505>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-99176>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99176/>. Everything for agents: <https://agentprime.io/llms.txt>.