CVE-2022-50166

Command timeout via drained HCI work queue

Published Jun 18, 2025 · Updated May 11, 2026

Improper locking in the Linux Bluetooth HCI core allows local users to trigger a kernel warning during HCI workqueue teardown. The HCI teardown path drains the command, event, and data workqueue while delayed command-timeout work can still enqueue onto that drained queue. Local low-privileged access and Bluetooth HCI activity are required, and the documented consequence is a command timeout and kernel warning rather than code execution or data access.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the Linux Bluetooth HCI core allows local users to trigger a kernel warning during HCI workqueue teardown. The HCI teardown path drains the command, event, and data workqueue while delayed command-timeout work can still enqueue onto that drained queue. Local low-privileged access and Bluetooth HCI activity are required, and the documented consequence is a command timeout and kernel warning rather than code execution or data access.

The record

CVE
CVE-2022-50166
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=3.19
  2. Affected versionversion=76727c02c1e14a2b561b806fa1d08acc1619ad27 <3b382555706558f5c0587862b6dc03e96a252bba
  3. Affected versionversion=76727c02c1e14a2b561b806fa1d08acc1619ad27 <4bf367fa1fefabdf14938d0ac9ed60020389112e
  4. Affected versionversion=76727c02c1e14a2b561b806fa1d08acc1619ad27 <877afadad2dce8aae1f2aad8ce47e072d4f6165e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.19; version=76727c02c1e14a2b561b806fa1d08acc1619ad27 <3b382555706558f5c0587862b6dc03e96a252bba; version=76727c02c1e14a2b561b806fa1d08acc1619ad27 <4bf367fa1fefabdf14938d0ac9ed60020389112e; version=76727c02c1e14a2b561b806fa1d08acc1619ad27 <877afadad2dce8aae1f2aad8ce47e072d4f6165e

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

CWE-667Improper Locking

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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