---
id: CVE-2026-89677
title: >-
  kernel: nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()
  (CVE-2026-89677)
summary: >-
  A flaw was found in the Linux kernel's Network File System Daemon (nfsd). When
  creating files, the `dentry_create()` function could return an unexpected
  directory entry (dentry). This could lead to a previously stored dentry being
  prematur…
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 6
affected:
  - enterprise_linux 6
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T10:22:15+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89677.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89677.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89677'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532419'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89677'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89677'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89677.mbox
  - url: 'https://git.kernel.org/stable/c/033e783709ce99662cf81f6abcad746a8da9d35f'
  - url: 'https://git.kernel.org/stable/c/3e2c79360c6a89975ec5b5a7d4ef937e4db91a27'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.00407
epssPercentile: 0.34735
scores:
  vendor: 6.8
  cna: 9.8
ingestedAt: '2026-09-14T15:23:07.473Z'
---

## Overview

A flaw was found in the Linux kernel's Network File System Daemon (nfsd). When creating files, the `dentry_create()` function could return an unexpected directory entry (dentry). This could lead to a previously stored dentry being prematurely freed and then used again, potentially causing memory corruption or a denial of service (DoS) due to an invalid memory access.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89677.json)

**kernel: nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

- Red Hat Enterprise Linux 6

No fix planned:

- Red Hat Enterprise Linux 6

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope