# nfsd: check client ownership when cancelling a copy-notify stateid

CVE record · `CVE-2026-89694`

- **Identifiers:** `CVE-2026-89694`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:46 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: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before 88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before 81b2cfe767943922eca906a2a5af23a0ce5d0f35` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before 6bba72b8ee68ad631b94bd439592cba46de54d7d` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before 75268f6cfe26b09a7e4d3216367e87fe9e2a26aa` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before b1eca07303594ca27f5dc360a6946bd7e1f5b04c` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before b42dc26a14b4ad5d6daaada11ec4c70744141c25` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before d801906165cb5cc250d5cbe44935594e170be3e2` (git)
  - affected: `ce0887ac96d35c7105090e166bb0807dc0a0e838 to before 6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.6`
  - unaffected: `before 5.6` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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:** 0.0022, the 12th percentile, on 14 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89694](https://www.cve.org/CVERecord?id=CVE-2026-89694)
- [NVD: CVE-2026-89694](https://nvd.nist.gov/vuln/detail/CVE-2026-89694)

### References from the CNA

- <https://git.kernel.org/stable/c/88daaed26e17e1c7e851859b5bbb4f0e1ab6d0e9>
- <https://git.kernel.org/stable/c/81b2cfe767943922eca906a2a5af23a0ce5d0f35>
- <https://git.kernel.org/stable/c/6bba72b8ee68ad631b94bd439592cba46de54d7d>
- <https://git.kernel.org/stable/c/75268f6cfe26b09a7e4d3216367e87fe9e2a26aa>
- <https://git.kernel.org/stable/c/b1eca07303594ca27f5dc360a6946bd7e1f5b04c>
- <https://git.kernel.org/stable/c/b42dc26a14b4ad5d6daaada11ec4c70744141c25>
- <https://git.kernel.org/stable/c/d801906165cb5cc250d5cbe44935594e170be3e2>
- <https://git.kernel.org/stable/c/6bdbfab96e0cf25e5f57dac5c09dc1749751a4bf>

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-2026-89694>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89694/>. Everything for agents: <https://agentprime.io/llms.txt>.