CVE-2022-49146

Guest service interruption via incomplete virtio restore

Published Feb 26, 2025 · Updated May 11, 2026

Improper virtio restoration in Linux kernel 5.16 before 5.16.19 and 5.17 before 5.17.2 allows local users to interrupt services. The virtio_device_restore function omits virtio_device_ready, so affected transports never run enable_cbs or set DRIVER_OK and their interrupts remain disabled. Reachability requires a suspended virtual machine using a virtio driver that omits virtio_device_ready during restore; the resulting IRQ shutdown interrupts guest device service.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper virtio restoration in Linux kernel 5.16 before 5.16.19 and 5.17 before 5.17.2 allows local users to interrupt services. The virtio_device_restore function omits virtio_device_ready, so affected transports never run enable_cbs or set DRIVER_OK and their interrupts remain disabled. Reachability requires a suspended virtual machine using a virtio driver that omits virtio_device_ready during restore; the resulting IRQ shutdown interrupts guest device service.

The record

CVE
CVE-2022-49146
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.16
  2. Affected versionversion=d50497eb4e554e1f0351e1836ee7241c059592e6 <4ae431113179d72c668b61df320af0c06d1aa5c5
  3. Affected versionversion=d50497eb4e554e1f0351e1836ee7241c059592e6 <8d65bc9a5be3f23c5e2ab36b6b8ef40095165b18
  4. Affected versionversion=d50497eb4e554e1f0351e1836ee7241c059592e6 <94e9f5da39ee5f8ea31be1585de31c54f10dedce

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=d50497eb4e554e1f0351e1836ee7241c059592e6 <4ae431113179d72c668b61df320af0c06d1aa5c5; version=d50497eb4e554e1f0351e1836ee7241c059592e6 <8d65bc9a5be3f23c5e2ab36b6b8ef40095165b18; version=d50497eb4e554e1f0351e1836ee7241c059592e6 <94e9f5da39ee5f8ea31be1585de31c54f10dedce

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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