// For flags

CVE-2022-37394

openstack-nova: Compute service fails to restart if the vnic_type of a bound port changed from direct to macvtap

Severity Score

3.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An issue was discovered in OpenStack Nova before 23.2.2, 24.x before 24.1.2, and 25.x before 25.0.2. By creating a neutron port with the direct vnic_type, creating an instance bound to that port, and then changing the vnic_type of the bound port to macvtap, an authenticated user may cause the compute service to fail to restart, resulting in a possible denial of service. Only Nova deployments configured with SR-IOV are affected.

Se ha detectado un problema en OpenStack Nova versiones anteriores a 23.2.2, 24.x anteriores a 24.1.2 y 25.x anteriores a 25.0.2. Al crear un puerto de neutrones con el vnic_type directo, crear una instancia vinculada a ese puerto y luego cambiar el vnic_type del puerto vinculado a macvtap, un usuario autenticado puede causar que el servicio de computación no sea reiniciado, resultando en una posible denegación de servicio. Sólo están afectadas las implantaciones de Nova configuradas con SR-IOV

OpenStack Compute is open source software designed to provision and manage large networks of virtual machines,creating a redundant and scalable cloud computing platform. It gives you the software, control panels, and APIs required to orchestrate a cloud, including running instances, managing networks, and controlling access through users and projects.OpenStack Compute strives to be both hardware and hypervisor agnostic, currently supporting a variety of standard hardware configurations and seven major hypervisors.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-08-03 CVE Reserved
  • 2022-08-03 CVE Published
  • 2024-08-03 CVE Updated
  • 2024-08-03 First Exploit
  • 2025-05-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openstack
Search vendor "Openstack"
Nova
Search vendor "Openstack" for product "Nova"
< 23.2.2
Search vendor "Openstack" for product "Nova" and version " < 23.2.2"
-
Affected
Openstack
Search vendor "Openstack"
Nova
Search vendor "Openstack" for product "Nova"
>= 24.0.0 < 24.1.2
Search vendor "Openstack" for product "Nova" and version " >= 24.0.0 < 24.1.2"
-
Affected
Openstack
Search vendor "Openstack"
Nova
Search vendor "Openstack" for product "Nova"
>= 25.0.0 < 25.0.2
Search vendor "Openstack" for product "Nova" and version " >= 25.0.0 < 25.0.2"
-
Affected