CVE-2022-50415

Kernel crash via unchecked workqueue allocation

Published Sep 18, 2025 · Updated Sep 18, 2025

NULL pointer dereference in the Linux PA-RISC LED driver allows local users to crash an affected kernel during driver startup. start_task() passes led_wq to queue_delayed_work() without checking whether create_singlethread_workqueue() returned NULL, leading __queue_work() to access wq->flags. The path requires the PA-RISC LED driver to start while workqueue allocation fails; the documented consequence is loss of system availability.

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

What happened

NULL pointer dereference in the Linux PA-RISC LED driver allows local users to crash an affected kernel during driver startup. start_task() passes led_wq to queue_delayed_work() without checking whether create_singlethread_workqueue() returned NULL, leading __queue_work() to access wq->flags. The path requires the PA-RISC LED driver to start while workqueue allocation fails; the documented consequence is loss of system availability.

The record

CVE
CVE-2022-50415
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=2.6.15
  2. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <3505c187b86136250b39e62c72a3a70435277af6
  3. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <41f563ab3c33698bdfc3403c7c2e6c94e73681e4
  4. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <5e4500454d75dd249be4695d83afa3ba0724c37e
  5. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <67c98fec87ed76b1feb2ae810051afd88dfa9df6
  6. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <77f8b628affaec692d83ad8bfa3520db8a0cc493
  7. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <ac838c663ba1fd6bff35a817fd89a47ab55e88e0
  8. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <c6db0c32f39684c89c97bc1ba1c9c4249ca09e48
  9. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <fc307b2905a3dd75c50a53b4d87ac9c912fb7c4e
  10. Affected versionversion=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <fc6d0f65f22040c6cc8a5ce032bf90252629de50

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.15; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <3505c187b86136250b39e62c72a3a70435277af6; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <41f563ab3c33698bdfc3403c7c2e6c94e73681e4; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <5e4500454d75dd249be4695d83afa3ba0724c37e; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <67c98fec87ed76b1feb2ae810051afd88dfa9df6; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <77f8b628affaec692d83ad8bfa3520db8a0cc493; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <ac838c663ba1fd6bff35a817fd89a47ab55e88e0; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <c6db0c32f39684c89c97bc1ba1c9c4249ca09e48; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <fc307b2905a3dd75c50a53b4d87ac9c912fb7c4e; version=3499495205a676d85fcc2f3c28e35ec9b43c47e3 <fc6d0f65f22040c6cc8a5ce032bf90252629de50

Published CVSS scores

5.5CISA-ADPCVSS: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 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-476NULL Pointer Dereference
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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