---
id: CVE-1999-1314
title: >-
  Vulnerability in union file system in FreeBSD 2.2 and earlier, and possibly
  other operating systems, allows local users to cause a denial of service
  (system reload) via a series of certain mount_union commands.
summary: >-
  Vulnerability in union file system in FreeBSD 2.2 and earlier, and possibly
  other operating systems, allows local users to cause a denial of service
  (system reload) via a series of certain mount_union commands.
severity: low
cvss: 2.1
cvssVector: 'AV:L/AC:L/Au:N/C:N/I:N/A:P'
published: '1996-05-17'
updated: '2026-06-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-1999-1314'
references:
  - url: >-
      ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-96:10.mount_union.asc
    label: cve@mitre.org
  - url: 'http://ciac.llnl.gov/ciac/bulletins/g-24.shtml'
    label: cve@mitre.org
  - url: 'http://www.iss.net/security_center/static/7429.php'
    label: cve@mitre.org
  - url: >-
      ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/old/FreeBSD-SA-96:10.mount_union.asc
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://ciac.llnl.gov/ciac/bulletins/g-24.shtml'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.iss.net/security_center/static/7429.php'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00328
epssPercentile: 0.26194
ingestedAt: '2026-06-22T15:59:08.072Z'
---

## Overview

Vulnerability in union file system in FreeBSD 2.2 and earlier, and possibly other operating systems, allows local users to cause a denial of service (system reload) via a series of certain mount_union commands.

## Remediation

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