# nfsd: fix null dereference in nfsd4_setattr for deleg timestamp attrs

CVE record · `CVE-2026-89679`

- **Identifiers:** `CVE-2026-89679`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **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: `7e13f4f8d27dc02fb88666f603c53ca749d56f92 to before 3c5119b799a7f57db332b2c31e806de16c869f0f` (git)
  - affected: `7e13f4f8d27dc02fb88666f603c53ca749d56f92 to before 3c896db123892256fd39af0ee8c2d02c63539983` (git)
  - affected: `7e13f4f8d27dc02fb88666f603c53ca749d56f92 to before fe456c8c0931bb3e8a03d429920e87fd85747fba` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.14`
  - unaffected: `before 6.14` (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

- 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:** 0.0072, the 54th 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-2026-89679](https://www.cve.org/CVERecord?id=CVE-2026-89679)
- [NVD: CVE-2026-89679](https://nvd.nist.gov/vuln/detail/CVE-2026-89679)

### References from the CNA

- <https://git.kernel.org/stable/c/3c5119b799a7f57db332b2c31e806de16c869f0f>
- <https://git.kernel.org/stable/c/3c896db123892256fd39af0ee8c2d02c63539983>
- <https://git.kernel.org/stable/c/fe456c8c0931bb3e8a03d429920e87fd85747fba>

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-2026-89679>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89679/>. Everything for agents: <https://agentprime.io/llms.txt>.