---
id: CVE-2026-89669
title: >-
  kernel: nfsd: initialize copy-notify stateid before publishing it
  (CVE-2026-89669)
summary: >-
  A flaw was found in the `nfsd` component of the Linux kernel. A use-after-free
  vulnerability exists due to improper initialization of the copy-notify state
  ID before its publication. A remote attacker could exploit this by sending a
  crafte…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 9
  - openshift_container_platform 4
  - enterprise_linux 6
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:11:15+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89669.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89669.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89669'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532111'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89669'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89669'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89669.mbox
  - url: 'https://git.kernel.org/stable/c/863b6e995665472f2af5be2436a874ab6a9e5ac6'
  - url: 'https://git.kernel.org/stable/c/d18d36395d973ef7372c8e6724970585f75b5c0b'
  - url: 'https://git.kernel.org/stable/c/4415a692346a39fdb647cbd717eda510159aaf55'
  - url: 'https://git.kernel.org/stable/c/9caad13b7cfe9ccb90cc405ac77335800e086595'
  - url: 'https://git.kernel.org/stable/c/e08a3dcaca0505f861e344a387f37f94d95dbdc2'
  - url: 'https://git.kernel.org/stable/c/a4d7fedcaaf33e60a01e53eafca9041ef966212f'
  - url: 'https://git.kernel.org/stable/c/4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b'
  - url: 'https://git.kernel.org/stable/c/129643893b79f8a3c6b72045f933fbab5ee424ca'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00684
epssPercentile: 0.51171
scores:
  vendor: 7
  cna: 9.8
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

A flaw was found in the `nfsd` component of the Linux kernel. A use-after-free vulnerability exists due to improper initialization of the copy-notify state ID before its publication. A remote attacker could exploit this by sending a crafted `OFFLOAD_CANCEL` operation, leading to a race condition that frees the state ID prematurely. This could result in a use-after-free, potentially allowing for arbitrary code execution or denial of service.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89669.json)

**kernel: nfsd: initialize copy-notify stateid before publishing it** — rated Important by Red Hat. Released 2026-09-11, updated 2026-09-18.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat Enterprise Linux 6

No fix planned:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4

## Remediation

Affected