---
id: CVE-2026-89098
title: 'Nfs-utils: nfs-utils: denial of service via assertion failure in fsidd'
summary: >-
  A flaw was found in nfs-utils. The fsidd daemon improperly handles input
  received over its local domain socket by relying on program assertions to
  verify command arguments. A local user can exploit this vulnerability by
  sending a malform…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-617
vendor: Red Hat
product: nfs-utils
affected:
  - nfs-utils (all versions)
  - nfs-utils
  - nfs-utils (all versions)
  - nfs-utils (all versions)
  - nfs-utils (all versions)
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-19T14:16:03.828286Z'
exploitAvailable: true
published: '2026-10-16'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T14:19:34.274Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89098'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89098'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2469511'
    label: RHBZ#2469511
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89098.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89098'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89098'
tags:
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00147
epssPercentile: 0.03883
ingestedAt: '2026-10-16T18:43:08.636Z'
---

## Overview

A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.

## Affected

- `nfs-utils (all versions)`
- `nfs-utils`
- `nfs-utils (all versions)`
- `nfs-utils (all versions)`
- `nfs-utils (all versions)`
- `openshift/ose-rhel-coreos-8 (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## 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 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89098.json)