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Vulnerability record · CVE-2018-14636 · published 10 September 2018

CVE-2018-14636: Openstack neutron vulnerability

Openstack · Neutron

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.

5.3 CVSS 3.0 Medium EPSS 1.2% · top 32.0% CWE-300 · CWE-300
5.3CVSS 3.0 base score, v2 3.5
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.launchpad.net/neutron/+bug/1734320 Issue TrackingThird Party Advisory
https://bugs.launchpad.net/neutron/+bug/1767422 Issue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14636 Issue TrackingThird Party Advisory
https://bugs.launchpad.net/neutron/+bug/1734320 Issue TrackingThird Party Advisory
https://bugs.launchpad.net/neutron/+bug/1767422 Issue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14636 Issue TrackingThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-14636), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.