{"id":"UBUNTU-CVE-2021-40797","details":"An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authenticated user may cause the API worker to consume increasing amounts of memory, resulting in API performance degradation or denial of service.","modified":"2026-02-04T02:13:22.194828Z","published":"2021-09-08T20:15:00Z","related":["USN-6067-1"],"upstream":["CVE-2021-40797"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-40797"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6067-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-40797"}],"affected":[{"package":{"name":"neutron","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/neutron@2:8.4.0-0ubuntu7.5?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:7.0.0-0ubuntu1","2:8.0.0~b1-0ubuntu2","2:8.0.0~b2-0ubuntu4","2:8.0.0~b2-0ubuntu5","2:8.0.0~b2-0ubuntu7","2:8.0.0~b3-0ubuntu1","2:8.0.0~rc1-0ubuntu1","2:8.0.0-0ubuntu1","2:8.1.0-0ubuntu0.16.04.2","2:8.1.2-0ubuntu1","2:8.2.0-0ubuntu1","2:8.3.0-0ubuntu1","2:8.3.0-0ubuntu1.1","2:8.3.0-0ubuntu1.2","2:8.4.0-0ubuntu1","2:8.4.0-0ubuntu2","2:8.4.0-0ubuntu3","2:8.4.0-0ubuntu4","2:8.4.0-0ubuntu5","2:8.4.0-0ubuntu6","2:8.4.0-0ubuntu7.1","2:8.4.0-0ubuntu7.2","2:8.4.0-0ubuntu7.3","2:8.4.0-0ubuntu7.4","2:8.4.0-0ubuntu7.5"],"ecosystem_specific":{"binaries":[{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-bgp-dragent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-common"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-dhcp-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-l3-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-linuxbridge-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-macvtap-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-metadata-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-metering-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-openvswitch-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-plugin-linuxbridge-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-plugin-ml2"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-plugin-openvswitch-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-plugin-sriov-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-server"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"neutron-sriov-agent"},{"binary_version":"2:8.4.0-0ubuntu7.5","binary_name":"python-neutron"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40797.json"}},{"package":{"name":"neutron","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/neutron@2:12.1.1-0ubuntu8.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:12.1.1-0ubuntu8.1"}]}],"versions":["2:11.0.1-0ubuntu1","2:12.0.0~b1-0ubuntu1","2:12.0.0~b1-0ubuntu2","2:12.0.0~b2-0ubuntu1","2:12.0.0~b3-0ubuntu1","2:12.0.0~rc1-0ubuntu1","2:12.0.0~rc2-0ubuntu1","2:12.0.0-0ubuntu1","2:12.0.0-0ubuntu1.1","2:12.0.0-0ubuntu1.2","2:12.0.0-0ubuntu1.3","2:12.0.0-0ubuntu1.4","2:12.0.0-0ubuntu2","2:12.0.0-0ubuntu3","2:12.0.1-0ubuntu1","2:12.0.1-0ubuntu1.1","2:12.0.2-0ubuntu1","2:12.0.3-0ubuntu1","2:12.0.5-0ubuntu1","2:12.0.5-0ubuntu4","2:12.0.5-0ubuntu5","2:12.0.6-0ubuntu1","2:12.0.6-0ubuntu2","2:12.0.6-0ubuntu3","2:12.1.0-0ubuntu1","2:12.1.1-0ubuntu1","2:12.1.1-0ubuntu2","2:12.1.1-0ubuntu3","2:12.1.1-0ubuntu4","2:12.1.1-0ubuntu7","2:12.1.1-0ubuntu8"],"ecosystem_specific":{"availability":"No 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