CVE-2022-49371

Local system hang via recursive device locking

Published Feb 26, 2025 · Updated May 11, 2026

Improper locking in affected Linux kernel releases allows local users to hang the system during asynchronous device probing. __device_attach holds the device lock while scheduling __device_attach_async_helper, but the synchronous fallback calls that helper and attempts to acquire the same lock again. Low-privileged local access and either memory-allocation failure or exhaustion of the asynchronous work limit are required; the bounded consequence is a device-attachment hang.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in affected Linux kernel releases allows local users to hang the system during asynchronous device probing. __device_attach holds the device lock while scheduling __device_attach_async_helper, but the synchronous fallback calls that helper and attempts to acquire the same lock again. Low-privileged local access and either memory-allocation failure or exhaustion of the asynchronous work limit are required; the bounded consequence is a device-attachment hang.

The record

CVE
CVE-2022-49371
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
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=4.2
  2. Affected versionversion=765230b5f084863183aa8adb3405ab3f32c0b16e <34fdd9b7def9d2fcb71bb7b0bc4848dd7313767e
  3. Affected versionversion=765230b5f084863183aa8adb3405ab3f32c0b16e <36ee9ffca8ef56c302f2855c4a5fccf61c0c1ada
  4. Affected versionversion=765230b5f084863183aa8adb3405ab3f32c0b16e <593b595332bd2d65e1a5c1ae7897996c157f5468
  5. Affected versionversion=765230b5f084863183aa8adb3405ab3f32c0b16e <b232b02bf3c205b13a26dcec08e53baddd8e59ed
  6. Affected versionversion=765230b5f084863183aa8adb3405ab3f32c0b16e <d53a227bfcd5160ce1b61d9954901968a20651e7
  7. Affected versionversion=765230b5f084863183aa8adb3405ab3f32c0b16e <df6de52b80aa3b46f5ac804412355ffe2e1df93e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=765230b5f084863183aa8adb3405ab3f32c0b16e <34fdd9b7def9d2fcb71bb7b0bc4848dd7313767e; version=765230b5f084863183aa8adb3405ab3f32c0b16e <36ee9ffca8ef56c302f2855c4a5fccf61c0c1ada; version=765230b5f084863183aa8adb3405ab3f32c0b16e <593b595332bd2d65e1a5c1ae7897996c157f5468; version=765230b5f084863183aa8adb3405ab3f32c0b16e <b232b02bf3c205b13a26dcec08e53baddd8e59ed; version=765230b5f084863183aa8adb3405ab3f32c0b16e <d53a227bfcd5160ce1b61d9954901968a20651e7; version=765230b5f084863183aa8adb3405ab3f32c0b16e <df6de52b80aa3b46f5ac804412355ffe2e1df93e

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

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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