CVE-2022-37394Public exploit

Compute-service startup failure via stale VNIC metadata

Published Aug 3, 2022 · Updated Aug 3, 2024

DoS in OpenStack Nova before 23.2.2, 24.x before 24.1.2, and 25.x before 25.0.2 allows remote authenticated users to block compute-service restart. During _init_instance, stale VIF metadata after a direct-to-macvtap port change makes Nova look up a parent VF netdev that no longer exists; the unhandled PciDeviceNotFoundById exception aborts startup. Any normal authenticated user can create the inconsistent port state, but the outage occurs only after nova-compute restarts on an SR-IOV deployment.

CVSS severity3.3
Low
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DoS in OpenStack Nova before 23.2.2, 24.x before 24.1.2, and 25.x before 25.0.2 allows remote authenticated users to block compute-service restart. During _init_instance, stale VIF metadata after a direct-to-macvtap port change makes Nova look up a parent VF netdev that no longer exists; the unhandled PciDeviceNotFoundById exception aborts startup. Any normal authenticated user can create the inconsistent port state, but the outage occurs only after nova-compute restarts on an SR-IOV deployment.

The record

CVE
CVE-2022-37394
Published
Aug 3, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
Unavailable
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.3GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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