---
id: CVE-1999-0084
title: >-
  Certain NFS servers allow users to use mknod to gain privileges by creating a
  writable kmem device and setting the UID to 0.
summary: >-
  Certain NFS servers allow users to use mknod to gain privileges by creating a
  writable kmem device and setting the UID to 0.
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
published: '1990-05-01'
updated: '2026-06-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-1999-0084'
references:
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/78'
    label: cve@mitre.org
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/78'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00411
epssPercentile: 0.35136
ingestedAt: '2026-06-19T03:39:00.666Z'
---

## Overview

Certain NFS servers allow users to use mknod to gain privileges by creating a writable kmem device and setting the UID to 0.

## Remediation

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