Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | neutron | 2:19.0.0-1 | — |
| Debian 13 | neutron | 2:19.0.0-1 | — |
| Debian 12 | neutron | 2:19.0.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | neutron | 2:20.3.0-0ubuntu1.1 | USN-6067-1 |
| Ubuntu 20.04 LTS | neutron | 2:16.4.2-0ubuntu6.2 | USN-6067-1 |
| Ubuntu 18.04 LTS | neutron | 2:12.1.1-0ubuntu8.1 | USN-6067-1 |
| Ubuntu 16.04 LTS | neutron | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 16 | python3-neutron +9 | 1:15.2.1-1.20220112133420.el8ost | RHSA-2022:0996, RHSA-2022:0990 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE OpenStack Cloud Crowbar 8 | openstack-neutron +1 | 11.0.9~dev69-3.43.1 | SUSE-SU-2022:1884-1 |
| SUSE OpenStack Cloud 8 | openstack-neutron +1 | 11.0.9~dev69-3.43.1 | SUSE-SU-2022:1884-1 |
| SUSE HPE Helion OpenStack 8 | openstack-neutron +1 | 11.0.9~dev69-3.43.1 | SUSE-SU-2022:1884-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | neutron | < 16.4.1 | 16.4.1 | GHSA-cpx3-696p-3cw9 |
| PyPI | neutron | >= 17.0.0, < 17.2.1 | 17.2.1 | GHSA-cpx3-696p-3cw9 |
| PyPI | neutron | >= 18.0.0, < 18.1.1 | 18.1.1 | GHSA-cpx3-696p-3cw9 |
| PyPI | neutron | < 16.4.1 · >= 17.0.0, < 17.2.1 · >= 18.0.0, < 18.1.1 | 16.4.1, 17.2.1, 18.1.1 | PYSEC-2021-329 |
Advisories 5
- RHSA-2022:0996 Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 (openstack-neutron) security update Red Hat Security Advisories (RHSA) · Oct 8, 2026
- RHSA-2022:0990 Red Hat Security Advisory: Red Hat OpenStack Platform 16.1 (openstack-neutron) security update Red Hat Security Advisories (RHSA) · Oct 8, 2026
- USN-6067-1 neutron vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2022:1884-1 Security update for openstack-neutron SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-0250 Red Hat OpenStack: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 21, 2025