# KVM: arm64: nv: Delay freeing of shadow S2 structures until VM destruction

CVE record · `CVE-2026-98440`

- **Identifiers:** `CVE-2026-98440`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:14 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: `4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 to before 876049f026b4dfaca0cc78ec81be0e639ca8525d` (git)
  - affected: `4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 to before 22e82acec93a681071ed36f70eabe2d0c4e0bebd` (git)
  - affected: `4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 to before 5bf1c9175e657b3c2dc1cf77403031ac7aadcf66` (git)
  - affected: `4f128f8e1aaac189f83d0f828bcdb2986d8d2e51 to before e5843f4effaa2ffac3e789ecd4456403564961d4` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.11`
  - unaffected: `before 6.11` (semver)
  - unaffected: `6.12.113 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.56 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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

- 7.0 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0012, the 1st percentile, on 9 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98440](https://www.cve.org/CVERecord?id=CVE-2026-98440)
- [NVD: CVE-2026-98440](https://nvd.nist.gov/vuln/detail/CVE-2026-98440)

### References from the CNA

- <https://git.kernel.org/stable/c/876049f026b4dfaca0cc78ec81be0e639ca8525d>
- <https://git.kernel.org/stable/c/22e82acec93a681071ed36f70eabe2d0c4e0bebd>
- <https://git.kernel.org/stable/c/5bf1c9175e657b3c2dc1cf77403031ac7aadcf66>
- <https://git.kernel.org/stable/c/e5843f4effaa2ffac3e789ecd4456403564961d4>

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-2026-98440>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98440/>. Everything for agents: <https://agentprime.io/llms.txt>.