---
id: CVE-2016-5362
aliases:
  - GHSA-qpwc-p365-pqrr
  - PYSEC-2026-854
title: >-
  OpenStack Neutron allows remote attackers to bypass an intended DHCP-spoofing
  protection mechanism
summary: >-
  OpenStack Neutron allows remote attackers to bypass an intended DHCP-spoofing
  protection mechanism
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
vendor: neutron
product: neutron
ecosystem: pip
affected:
  - neutron < 7.0.5
  - 'neutron >= 8.0.0, < 8.1.1'
patched:
  - neutron 7.0.5
  - neutron 8.1.1
published: '2022-05-14'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-qpwc-p365-pqrr'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2016-5362'
  - url: 'https://access.redhat.com/errata/RHSA-2016:1473'
  - url: 'https://access.redhat.com/errata/RHSA-2016:1474'
  - url: 'https://bugs.launchpad.net/neutron/+bug/1558658'
  - url: 'https://github.com/openstack/neutron'
  - url: 'https://review.openstack.org/#/c/300202'
  - url: 'https://review.openstack.org/#/c/303563'
  - url: 'https://review.openstack.org/#/c/303572'
  - url: 'https://security.openstack.org/ossa/OSSA-2016-009.html'
  - url: 'http://www.openwall.com/lists/oss-security/2016/06/10/5'
  - url: 'http://www.openwall.com/lists/oss-security/2016/06/10/6'
tags:
  - osv
  - pip
epss: 0.0367
epssPercentile: 0.8917
ingestedAt: '2026-07-08T18:25:52.464Z'
---

## Overview

The IPTables firewall in OpenStack Neutron before 7.0.4 and 8.0.0 through 8.1.0 allows remote attackers to bypass an intended DHCP-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via a crafted DHCP discovery message.

## Affected packages

- `neutron < 7.0.5`
- `neutron >= 8.0.0, < 8.1.1`

## Remediation

Upgrade to a patched release:

- `neutron 7.0.5`
- `neutron 8.1.1`