---
id: CVE-2015-5240
aliases:
  - GHSA-hhpj-6pj7-wpx5
  - PYSEC-2026-853
title: OpenStack Neutron Race condition vulnerability
summary: OpenStack Neutron Race condition vulnerability
severity: low
vendor: neutron
product: neutron
ecosystem: pip
affected:
  - neutron < 7.0.0
patched:
  - neutron 7.0.0
published: '2022-05-17'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hhpj-6pj7-wpx5'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2015-5240'
  - url: >-
      https://github.com/openstack/neutron/commit/767cea23de44a963c6793ffe30ea5c6827d27a38
  - url: >-
      https://github.com/openstack/neutron/commit/bbca973986fdc99eae9d1b2545e8246c0b2be2e2
  - url: >-
      https://github.com/openstack/neutron/commit/fdc3431ccd219accf6a795079d9b67b8656eed8e
  - url: 'https://access.redhat.com/errata/RHSA-2015:1909'
  - url: 'https://access.redhat.com/security/cve/CVE-2015-5240'
  - url: 'https://bugs.launchpad.net/neutron/+bug/1489111'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1258458'
  - url: 'https://github.com/openstack/neutron'
  - url: 'https://security.openstack.org/ossa/OSSA-2015-018.html'
  - url: 'http://rhn.redhat.com/errata/RHSA-2015-1909.html'
  - url: 'http://www.openwall.com/lists/oss-security/2015/09/08/9'
tags:
  - osv
  - pip
epss: 0.00971
epssPercentile: 0.59912
ingestedAt: '2026-07-08T18:25:50.246Z'
---

## Overview

Race condition in OpenStack Neutron before 2014.2.4 and 2015.1 before 2015.1.2, when using the ML2 plugin or the security groups AMQP API, allows remote authenticated users to bypass IP anti-spoofing controls by changing the device owner of a port to start with network: before the security group rules are applied.

## Affected packages

- `neutron < 7.0.0`

## Remediation

Upgrade to a patched release:

- `neutron 7.0.0`