CVE-2019-10876: Openstack Neutron

Medium severity, CVSS 6.5. EPSS: 1.7% chance of exploitation in the next 30 days.

An issue was discovered in OpenStack Neutron 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By creating two security groups with separate/overlapping port ranges, an authenticated user may prevent Neutron from being able to configure networks on any compute nodes where those security groups are present, because of an Open vSwitch (OVS) firewall KeyError. All Neutron deployments utilizing neutron-openvswitch-agent are affected.

Affected products

• Openstack Neutron: from 11.0.0, before 11.0.7 (fixed in 11.0.7); from 12.0.0, before 12.0.6 (fixed in 12.0.6); from 13.0.0, before 13.0.3 (fixed in 13.0.3)
• Red Hat Openstack: version 13 only; version 14 only

Published 2019-04-05. Last modified 2026-06-17.