CVE-2022-50744

Local system lockup via interrupt-unsafe spinlock

Published Dec 24, 2025 · Updated Dec 24, 2025

Concurrency flaw in the Linux kernel lpfc driver allows local users to trigger a hard lockup by reading rx_monitor during I/O. lpfc_rx_monitor_report uses spin_lock_bh, which does not exclude the timer interrupt path that also takes the receive-monitor lock. The lpfc driver, its debugfs rx_monitor file, simultaneous storage I/O, and a timer interrupt are required; the resulting deadlock panics or stalls the host.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Concurrency flaw in the Linux kernel lpfc driver allows local users to trigger a hard lockup by reading rx_monitor during I/O. lpfc_rx_monitor_report uses spin_lock_bh, which does not exclude the timer interrupt path that also takes the receive-monitor lock. The lpfc driver, its debugfs rx_monitor file, simultaneous storage I/O, and a timer interrupt are required; the resulting deadlock panics or stalls the host.

The record

CVE
CVE-2022-50744
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2cf66428a2545bb33beb9624124a2377468bb478
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <39761417ea7b654217d6d9085afbf7c87ba3675d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c44e50f4a0ec00c2298f31f91bc2c3e9bbd81c7e
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cd542900ee5147028bbe603b238efcab8d720838

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2cf66428a2545bb33beb9624124a2377468bb478; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <39761417ea7b654217d6d9085afbf7c87ba3675d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c44e50f4a0ec00c2298f31f91bc2c3e9bbd81c7e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cd542900ee5147028bbe603b238efcab8d720838

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint 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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