---
id: CVE-2026-89666
title: >-
  kernel: nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops
  (CVE-2026-89666)
summary: >-
  A flaw was found in the kernel. A remote attacker, acting as an NFSv3 client,
  can send malformed time values during SETATTR or create operations. This can
  lead to the corruption of on-disk metadata, resulting in incorrect timestamps
  for fi…
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 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T08:54:51+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89666.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89666.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89666'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532519'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89666'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89666'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89666.mbox
  - url: 'https://git.kernel.org/stable/c/55341d8a5a0f5853e70d46f5a55cf06007808f1d'
  - url: 'https://git.kernel.org/stable/c/54e02f5e32c52fb395f2ee02986a6c6d5608d22b'
  - url: 'https://git.kernel.org/stable/c/e2543852152bcf9aeb57da17d9f9219f7df8aafb'
  - url: 'https://git.kernel.org/stable/c/eb0eca7720662ba5847df1510e73801f7f473094'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.0644
ingestedAt: '2026-09-14T11:11:19.885Z'
---

## Overview

A flaw was found in the kernel. A remote attacker, acting as an NFSv3 client, can send malformed time values during SETATTR or create operations. This can lead to the corruption of on-disk metadata, resulting in incorrect timestamps for files. This issue affects filesystems that support nanosecond granularity, such as ext4 and XFS.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89666.json)

**kernel: nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.

Affected:

- Red Hat Enterprise Linux 10
- 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

No fix planned:

- Red Hat Enterprise Linux 6
- 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