---
id: CVE-2026-89665
title: >-
  kernel: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE
  (CVE-2026-89665)
summary: >-
  A flaw was found in the Linux kernel's nfsd component. A remote attacker could
  exploit this vulnerability by sending a specially crafted NFSv2 SETATTR or
  CREATE request with an out-of-range 'useconds' value. This could lead to
  incorrect ti…
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-190
vendor: Red Hat
product: Red Hat Enterprise Linux 8
affected:
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T05:37:00+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89665.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89665.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89665'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532498'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89665'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89665'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89665.mbox
  - url: 'https://git.kernel.org/stable/c/cdc3299f7072777b09c9582a3b8b65bb163ddcf3'
  - url: 'https://git.kernel.org/stable/c/09a79d9ab35a39603c834e8f6333603292f9c816'
  - url: 'https://git.kernel.org/stable/c/5296a2442d12d45d6eea7b4d3ec3ffecc1821cac'
  - url: 'https://git.kernel.org/stable/c/1db456ffc22e045f49f7b9e62415a26b3f33f200'
  - url: 'https://git.kernel.org/stable/c/a937dd1aa2d92291fe0a1860d17e90d8f206cd22'
  - url: 'https://git.kernel.org/stable/c/ad02d095439f89cbd6629420c7e3ba476457b83b'
  - url: 'https://git.kernel.org/stable/c/1195483965a5f63d2dde18054ec7e50a23b9071c'
  - url: 'https://git.kernel.org/stable/c/26709c8ffe73772eb69e68d553ac71d91228dccc'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.0062
epssPercentile: 0.48387
scores:
  vendor: 7
  cna: 8.2
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

A flaw was found in the Linux kernel's nfsd component. A remote attacker could exploit this vulnerability by sending a specially crafted NFSv2 SETATTR or CREATE request with an out-of-range 'useconds' value. This could lead to incorrect timestamps being written to the filesystem, resulting in data corruption. Additionally, such malformed requests may cause a Denial of Service (DoS) by triggering an RPC GARBAGE_ARGS reply.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89665.json)

**kernel: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

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

No fix planned:

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

Not affected:

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

## Remediation

Out of support scope