# CVE-2018-14636: neutron-common: Live-migrated instances are briefly able to inspect traffic for other instances on the same hypervisor

CVE-2018-14636 is fixed in 15 products on 1 platform, first by neutron-common 2:12.0.3-0ubuntu1, released September 10, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-14636
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.0117
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 10, 2018

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | neutron-common Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-common 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-common-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-dhcp-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-dhcp-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-dhcp-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-l3-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-l3-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-l3-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-linuxbridge-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-linuxbridge-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-linuxbridge-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-macvtap-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-macvtap-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-macvtap-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-metadata-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-metadata-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-metadata-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-metering-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-metering-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-metering-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-openvswitch-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-openvswitch-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-openvswitch-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-plugin-linuxbridge-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-plugin-linuxbridge-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-linuxbridge-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-plugin-ml2 Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-plugin-ml2 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-ml2-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-plugin-openvswitch-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-plugin-openvswitch-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-openvswitch-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-plugin-sriov-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-plugin-sriov-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-plugin-sriov-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-server Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-server 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-server-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | neutron-sriov-agent Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [neutron-sriov-agent 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-neutron-sriov-agent-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |
| Linux | python-neutron Ubuntu 18.04.6 LTS (bionic) | 2:12.0.3-0ubuntu1 | [python-neutron 2:12.0.3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python-neutron-2-12.0.3-0ubuntu1.md) | Sep 10, 2018 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo