# NFSD: restart ssc_expire_umount walk after dropping nfsd_ssc_lock

CVE record · `CVE-2026-89712`

- **Identifiers:** `CVE-2026-89712`
- **State:** Confirmed
- **Severity:** CVSS 9.8 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 9.8: 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: `a4bc287943f5695209ff36bdc89f17b48d68fae7 to before 2b59029b8f24a99b5d844af2da3950d39d36eeea` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before d9e151fea5ed706c1284adacabd869b0be745db2` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before 659ee3da073164e1e6e40dfcbc26eeed85845f93` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before 60680ae7243b22de3d09be990d8e23bcfc4af837` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before 77de363d9a1c8cd35f20482782c612cda085791a` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before 4ed8d2317aef21cc2a9e5a55d6b59860b4b151a8` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before 7377fa964b8aaf47cb04e5efcc4c82d15e8c2ce9` (git)
  - affected: `f4e44b393389c77958f7c58bf4415032b4cda15b to before 036c1b182f4da65363e79ec0ac276edc6b7296e5` (git)
  - affected: `5.10.220 to before 5.10.270` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.14`
  - unaffected: `before 5.14` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0071, 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-2026-89712](https://www.cve.org/CVERecord?id=CVE-2026-89712)
- [NVD: CVE-2026-89712](https://nvd.nist.gov/vuln/detail/CVE-2026-89712)

### References from the CNA

- <https://git.kernel.org/stable/c/2b59029b8f24a99b5d844af2da3950d39d36eeea>
- <https://git.kernel.org/stable/c/d9e151fea5ed706c1284adacabd869b0be745db2>
- <https://git.kernel.org/stable/c/659ee3da073164e1e6e40dfcbc26eeed85845f93>
- <https://git.kernel.org/stable/c/60680ae7243b22de3d09be990d8e23bcfc4af837>
- <https://git.kernel.org/stable/c/77de363d9a1c8cd35f20482782c612cda085791a>
- <https://git.kernel.org/stable/c/4ed8d2317aef21cc2a9e5a55d6b59860b4b151a8>
- <https://git.kernel.org/stable/c/7377fa964b8aaf47cb04e5efcc4c82d15e8c2ce9>
- <https://git.kernel.org/stable/c/036c1b182f4da65363e79ec0ac276edc6b7296e5>

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-2026-89712>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89712/>. Everything for agents: <https://agentprime.io/llms.txt>.