# nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops

CVE record · `CVE-2026-89666`

- **Identifiers:** `CVE-2026-89666`
- **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:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 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: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before cacda0762d7af24a27f7265711bc05095ece56b9` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 98fc1d21a7b80324ba64b949ac6bcc00364dd068` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 55341d8a5a0f5853e70d46f5a55cf06007808f1d` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 54e02f5e32c52fb395f2ee02986a6c6d5608d22b` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e2543852152bcf9aeb57da17d9f9219f7df8aafb` (git)
  - affected: `1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before eb0eca7720662ba5847df1510e73801f7f473094` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.12`
  - unaffected: `before 2.6.12` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 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:** 0.0017, the 6th 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-2026-89666](https://www.cve.org/CVERecord?id=CVE-2026-89666)
- [NVD: CVE-2026-89666](https://nvd.nist.gov/vuln/detail/CVE-2026-89666)

### References from the CNA

- <https://git.kernel.org/stable/c/cacda0762d7af24a27f7265711bc05095ece56b9>
- <https://git.kernel.org/stable/c/98fc1d21a7b80324ba64b949ac6bcc00364dd068>
- <https://git.kernel.org/stable/c/55341d8a5a0f5853e70d46f5a55cf06007808f1d>
- <https://git.kernel.org/stable/c/54e02f5e32c52fb395f2ee02986a6c6d5608d22b>
- <https://git.kernel.org/stable/c/e2543852152bcf9aeb57da17d9f9219f7df8aafb>
- <https://git.kernel.org/stable/c/eb0eca7720662ba5847df1510e73801f7f473094>

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-2026-89666>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89666/>. Everything for agents: <https://agentprime.io/llms.txt>.