# KVM: SEV: Forcefully invalidate SNP VMSA if its backing gmem page is zapped

CVE record · `CVE-2026-90040`

- **Identifiers:** `CVE-2026-90040`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:33 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: `e366f92ea99e1961fbad5e2110900e9f4fcb249b to before ef4dee4640c6adc3051401399b0788135e77d50b` (git)
  - affected: `e366f92ea99e1961fbad5e2110900e9f4fcb249b to before 2640cc26ed0dd1bf6ec2f6852a60e494093db3e5` (git)
  - affected: `e366f92ea99e1961fbad5e2110900e9f4fcb249b to before d1a3c216233413f57f5341a9b878b7e2dde7e785` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.11`
  - unaffected: `before 6.11` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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:** 0.0021, the 10th percentile, on 13 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90040](https://www.cve.org/CVERecord?id=CVE-2026-90040)
- [NVD: CVE-2026-90040](https://nvd.nist.gov/vuln/detail/CVE-2026-90040)

### References from the CNA

- <https://git.kernel.org/stable/c/ef4dee4640c6adc3051401399b0788135e77d50b>
- <https://git.kernel.org/stable/c/2640cc26ed0dd1bf6ec2f6852a60e494093db3e5>
- <https://git.kernel.org/stable/c/d1a3c216233413f57f5341a9b878b7e2dde7e785>

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-2026-90040>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-90040/>. Everything for agents: <https://agentprime.io/llms.txt>.