---
id: CVE-2026-89668
title: >-
  kernel: nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()
  (CVE-2026-89668)
summary: >-
  A flaw was found in the `nfsd` component of the Linux kernel. The
  `nfsd_debugfs_init()` function is called before `nfsd4_init_slabs()`. If the
  slab allocation fails, the `nfsd_debugfs_exit()` cleanup function is bypassed,
  leaving orphaned …
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 10
affected:
  - enterprise_linux 10
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T11:02:28+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89668.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89668.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89668'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532527'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89668'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89668'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89668.mbox
  - url: 'https://git.kernel.org/stable/c/2c390c8a1764d67095fe444401861fac4c049362'
  - url: 'https://git.kernel.org/stable/c/4ae5d7490ae6a7b83b3d607f88c499f4f85e753a'
  - url: 'https://git.kernel.org/stable/c/ab43ff94f5dfc2b6a080b167b69855eb7655c98b'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00184
epssPercentile: 0.07038
scores:
  vendor: 5.5
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.473Z'
---

## Overview

A flaw was found in the `nfsd` component of the Linux kernel. The `nfsd_debugfs_init()` function is called before `nfsd4_init_slabs()`. If the slab allocation fails, the `nfsd_debugfs_exit()` cleanup function is bypassed, leaving orphaned debugfs files with stale function pointers. This can lead to a use-after-free vulnerability, potentially allowing a local attacker to cause a denial of service or escalate privileges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89668.json)

**kernel: nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

- Red Hat Enterprise Linux 10

No fix planned:

- Red Hat Enterprise Linux 10

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Affected