CVE-2022-49536

System hang via lpfc lock-order inversion

Published Feb 26, 2025 · Updated May 11, 2026

Improper locking in the Linux kernel lpfc driver allows local users to hang affected systems during high-volume SCSI I/O. The lpfc_abort_handler takes phba->hbalock before lpfc_cmd->buf_lock while the completion path takes the locks in the opposite order, creating a deadlock. Reaching the flaw requires the lpfc driver and stress I/O with at least 500 virtual ports; the reported consequence is a hard system lockup.

CVSS severity5.5
Medium
EPSS probability0.20%
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 kernel lpfc driver allows local users to hang affected systems during high-volume SCSI I/O. The lpfc_abort_handler takes phba->hbalock before lpfc_cmd->buf_lock while the completion path takes the locks in the opposite order, creating a deadlock. Reaching the flaw requires the lpfc driver and stress I/O with at least 500 virtual ports; the reported consequence is a hard system lockup.

The record

CVE
CVE-2022-49536
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=5.1
  2. Affected versionversion=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <03cbbd7c2f5ee288f648f4aeedc765a181188553
  3. Affected versionversion=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <0c4eed901285b9cae36a622f32bea3e92490da6c
  4. Affected versionversion=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <21c0d469349957b5dc811c41200a2a998996ca8d
  5. Affected versionversion=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <7625e81de2164a082810e1f27547d388406da610

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <03cbbd7c2f5ee288f648f4aeedc765a181188553; version=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <0c4eed901285b9cae36a622f32bea3e92490da6c; version=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <21c0d469349957b5dc811c41200a2a998996ca8d; version=c2017260eea2db62e7bb1b7cbb1759f1d11ed067 <7625e81de2164a082810e1f27547d388406da610

Published CVSS scores

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

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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
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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