PYSEC-2026-853

    Dashboard / Vulnerabilities / PYSEC-2026-853

    PYSEC-2026-853

    Published: 6 Jul 2026Last Modified: 7 Jul 2026

    Summary: OpenStack Neutron Race condition vulnerability

    Details: 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.

    References: https://nvd.nist.gov/vuln/detail/CVE-2015-5240, https://github.com/openstack/neutron/commit/767cea23de44a963c6793ffe30ea5c6827d27a38, https://github.com/openstack/neutron/commit/bbca973986fdc99eae9d1b2545e8246c0b2be2e2, https://github.com/openstack/neutron/commit/fdc3431ccd219accf6a795079d9b67b8656eed8e, https://access.redhat.com/errata/RHSA-2015:1909, https://access.redhat.com/security/cve/CVE-2015-5240, https://bugs.launchpad.net/neutron/+bug/1489111, https://bugzilla.redhat.com/show_bug.cgi?id=1258458, https://github.com/openstack/neutron, https://security.openstack.org/ossa/OSSA-2015-018.html, http://rhn.redhat.com/errata/RHSA-2015-1909.html, http://www.openwall.com/lists/oss-security/2015/09/08/9, https://pypi.org/project/neutron, https://github.com/advisories/GHSA-hhpj-6pj7-wpx5

    Affected packages

    Package

    Name: neutron

    Purl: pkg:pypi/neutron

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -7.0.0

    Affected versions

    0.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PYSEC-2026-853 | CVE-DB