CVE-2022-37394

Name: CVE-2022-37394
Creator: NVD / NIST
Published: 2022-08-03T07:15:07.757+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.3/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2022-37394 is a low-severity vulnerability rated 3.3/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

3.3/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

EPSS Probability

0.29%

21.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Openstack	Nova	< 23.2.2
Openstack	Nova	>= 24.0.0, < 24.1.2
Openstack	Nova	>= 25.0.0, < 25.0.2

References

https://bugs.launchpad.net/ossa/+bug/1981813Exploit, Issue Tracking, Third Party Advisory
https://review.opendev.org/c/openstack/nova/+/849985Patch, Third Party Advisory
https://review.opendev.org/c/openstack/nova/+/850003Third Party Advisory
https://bugs.launchpad.net/ossa/+bug/1981813Exploit, Issue Tracking, Third Party Advisory
https://review.opendev.org/c/openstack/nova/+/849985Patch, Third Party Advisory
https://review.opendev.org/c/openstack/nova/+/850003Third Party Advisory

Timeline

Published: Aug 3, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-37394?

How severe is CVE-2022-37394?

CVE-2022-37394 has a CVSS score of 3.3/10 (LOW severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2022-37394?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-37394?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST