# KVM: x86/mmu: Cope with the SS bit being set in #NPF exit codes

CVE record · `CVE-2026-99120`

- **Identifiers:** `CVE-2026-99120`
- **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:** 28 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:34 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: `8db428fd5229ba509d515af10d7f33d7d4a54bfe to before 0caeefed99b37f03251a00eb1fdb403a1cf2cb68` (git)
  - affected: `8db428fd5229ba509d515af10d7f33d7d4a54bfe to before d6e08ec2fff45e0ec69f11010851650d7c6282b9` (git)
  - affected: `8db428fd5229ba509d515af10d7f33d7d4a54bfe to before e90ab3669181c6469e3647ef2b30ae408275f496` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.18`
  - unaffected: `before 6.18` (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:** 0.0017, the 6th percentile, on 5 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-2026-99120](https://www.cve.org/CVERecord?id=CVE-2026-99120)
- [NVD: CVE-2026-99120](https://nvd.nist.gov/vuln/detail/CVE-2026-99120)

### References from the CNA

- <https://git.kernel.org/stable/c/0caeefed99b37f03251a00eb1fdb403a1cf2cb68>
- <https://git.kernel.org/stable/c/d6e08ec2fff45e0ec69f11010851650d7c6282b9>
- <https://git.kernel.org/stable/c/e90ab3669181c6469e3647ef2b30ae408275f496>

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-2026-99120>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99120/>. Everything for agents: <https://agentprime.io/llms.txt>.