CVE-2018-14636: Openstack Neutron

Medium severity, CVSS 5.3. EPSS: 1.2% chance of exploitation in the next 30 days.

Live-migrated instances are briefly able to inspect traffic for other instances on the same hypervisor. This brief window could be extended indefinitely if the instance's port is set administratively down prior to live-migration and kept down after the migration is complete. This is possible due to the Open vSwitch integration bridge being connected to the instance during migration. When connected to the integration bridge, all traffic for instances using the same Open vSwitch instance would potentially be visible to the migrated guest, as the required Open vSwitch VLAN filters are only applied post-migration. Versions of openstack-neutron before 13.0.0.0b2, 12.0.3, 11.0.5 are vulnerable.

Affected products

• Openstack Neutron: from 7.0.0, up to and including 11.0.4; from 12.0.0, up to and including 12.0.2; version 13.0.0 only

Published 2018-09-10. Last modified 2026-06-17.