# NFS: Return a delegation the client fails to record

CVE record · `CVE-2026-90234`

- **Identifiers:** `CVE-2026-90234`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:07 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: `ade04647dd56881e285983af3db702d56ee97e86 to before 61b23f482b2082e77d2f78bd1624f93a12ec35ce` (git)
  - affected: `ade04647dd56881e285983af3db702d56ee97e86 to before 9e71e332fa2c7a48f3d00001f856a13cc2d69639` (git)
  - affected: `ade04647dd56881e285983af3db702d56ee97e86 to before fe3b1c8966a27b70599d28ce7e80819adac1ff22` (git)
  - affected: `ade04647dd56881e285983af3db702d56ee97e86 to before 6822ba1ae9b6df6a094f7f8998f1da734c85fa19` (git)
  - affected: `ade04647dd56881e285983af3db702d56ee97e86 to before 92533e49fe3c455088657b862cf3562260c0ce25` (git)
  - affected: `ade04647dd56881e285983af3db702d56ee97e86 to before 220af23d863995091f0edeb1e6aa0945b3db8b37` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.0`
  - unaffected: `before 4.0` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0068, the 53rd 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90234](https://www.cve.org/CVERecord?id=CVE-2026-90234)
- [NVD: CVE-2026-90234](https://nvd.nist.gov/vuln/detail/CVE-2026-90234)

### References from the CNA

- <https://git.kernel.org/stable/c/61b23f482b2082e77d2f78bd1624f93a12ec35ce>
- <https://git.kernel.org/stable/c/9e71e332fa2c7a48f3d00001f856a13cc2d69639>
- <https://git.kernel.org/stable/c/fe3b1c8966a27b70599d28ce7e80819adac1ff22>
- <https://git.kernel.org/stable/c/6822ba1ae9b6df6a094f7f8998f1da734c85fa19>
- <https://git.kernel.org/stable/c/92533e49fe3c455088657b862cf3562260c0ce25>
- <https://git.kernel.org/stable/c/220af23d863995091f0edeb1e6aa0945b3db8b37>

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-2026-90234>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90234/>. Everything for agents: <https://agentprime.io/llms.txt>.