# nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()

CVE record · `CVE-2026-89697`

- **Identifiers:** `CVE-2026-89697`
- **State:** Confirmed
- **Severity:** CVSS 9.1 Critical
- **Critical:** Yes: CVSS 9+
- **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.

## Critical

Critical, because:

- CVSS score 9.1: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before 3eec9d791968c177a4a8cda9af5c04f79dae09cb` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before 9229d824b938f4fb0ea7a5dddade51735e6fe6f9` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before 2150305134889fb2fc25228d35353bd2f6f29500` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before d823bf9285cdf4514873b85ab5a888878dd4e8f4` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before 15ca3b64a69caa6194bed8f98a20ed90a11c11dd` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before 533964d420d385e11b08dd4c56c66ef5dcccaf08` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before c4a409b86a92815181a8e9395c6bf1696ad19175` (git)
  - affected: `cc265089ce1b176dde963c74b53593446ee7f99a to before 4e475be769aa9f7a2c1ce55a2b8592cfccacddcc` (git)
  - affected: `1cb57d81cf20fe24b9e2e1daf57bfbdc24b77cd8` (git)
  - affected: `3.18.46 to before 3.19` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.2`
  - unaffected: `before 4.2` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0070, the 53rd 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-2026-89697](https://www.cve.org/CVERecord?id=CVE-2026-89697)
- [NVD: CVE-2026-89697](https://nvd.nist.gov/vuln/detail/CVE-2026-89697)

### References from the CNA

- <https://git.kernel.org/stable/c/3eec9d791968c177a4a8cda9af5c04f79dae09cb>
- <https://git.kernel.org/stable/c/9229d824b938f4fb0ea7a5dddade51735e6fe6f9>
- <https://git.kernel.org/stable/c/2150305134889fb2fc25228d35353bd2f6f29500>
- <https://git.kernel.org/stable/c/d823bf9285cdf4514873b85ab5a888878dd4e8f4>
- <https://git.kernel.org/stable/c/15ca3b64a69caa6194bed8f98a20ed90a11c11dd>
- <https://git.kernel.org/stable/c/533964d420d385e11b08dd4c56c66ef5dcccaf08>
- <https://git.kernel.org/stable/c/c4a409b86a92815181a8e9395c6bf1696ad19175>
- <https://git.kernel.org/stable/c/4e475be769aa9f7a2c1ce55a2b8592cfccacddcc>

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-2026-89697>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89697/>. Everything for agents: <https://agentprime.io/llms.txt>.