{"id":"PYSEC-2026-852","summary":"OpenStack Neutron Intended MAC-spoofing protection mechanism bypass","details":"The IPTables firewall in OpenStack Neutron up to 7.0.4 and 8.x before 8.1.0 allows remote attackers to bypass an intended MAC-spoofing protection mechanism and consequently cause a denial of service or intercept network traffic via (1) a crafted DHCP discovery message or (2) crafted non-IP traffic.","aliases":["CVE-2016-5363","GHSA-9pp3-cvmq-9p22"],"modified":"2026-07-07T11:46:06.844278785Z","published":"2026-07-06T08:03:25.500474Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2016-5363"},{"type":"WEB","url":"https://github.com/openstack/neutron/commit/5853af9cba6733725d6c9ac0db644f426713f0cf"},{"type":"WEB","url":"https://github.com/openstack/neutron/commit/6a93ee8ac1a901c255e3475a24f1afc11d8bf80f"},{"type":"WEB","url":"https://github.com/openstack/neutron/commit/997d7b03fb7f5528f0a3ce70867b9dcd9321509e"},{"type":"WEB","url":"https://github.com/openstack/neutron/commit/fd5fd259a02156babdfcb12f66cde6ec9e7274ae"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2016:1473"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2016:1474"},{"type":"WEB","url":"https://bugs.launchpad.net/neutron/+bug/1558658"},{"type":"PACKAGE","url":"https://github.com/openstack/neutron"},{"type":"WEB","url":"https://review.openstack.org/#/c/299021"},{"type":"WEB","url":"https://review.openstack.org/#/c/299023"},{"type":"WEB","url":"https://review.openstack.org/#/c/299025"},{"type":"WEB","url":"https://security.openstack.org/ossa/OSSA-2016-009.html"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2016/06/10/5"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2016/06/10/6"},{"type":"PACKAGE","url":"https://pypi.org/project/neutron"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-9pp3-cvmq-9p22"}],"affected":[{"package":{"name":"neutron","ecosystem":"PyPI","purl":"pkg:pypi/neutron"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.1.0"},{"introduced":"8.0.0"},{"fixed":"8.1.0"}]}],"versions":["0.0"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/neutron/PYSEC-2026-852.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"}]}