CVE-2022-50491

System hang via runtime PM in atomic context

Published Oct 4, 2025 · Updated Oct 4, 2025

A CoreSight CTI flaw in Linux allows local users to hang an affected ARM Juno system by starting a Perf trace event. The cti_enable_hw() and cti_disable_hw() paths invoke runtime power-management operations from atomic context, allowing firmware communication to sleep where scheduling is forbidden. Reachability requires an ARM CoreSight CTI configuration and permission to start the affected Perf event; the demonstrated consequence is a system hang.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A CoreSight CTI flaw in Linux allows local users to hang an affected ARM Juno system by starting a Perf trace event. The cti_enable_hw() and cti_disable_hw() paths invoke runtime power-management operations from atomic context, allowing firmware communication to sleep where scheduling is forbidden. Reachability requires an ARM CoreSight CTI configuration and permission to start the affected Perf event; the demonstrated consequence is a system hang.

The record

CVE
CVE-2022-50491
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 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=5.7
  2. Affected versionversion=835d722ba10ac924adba1e8a46f2d80955222b4b <4c365a0c21aaf2b8fcc88de8dc298803288f61ac
  3. Affected versionversion=835d722ba10ac924adba1e8a46f2d80955222b4b <6746eae4bbaddcc16b40efb33dab79210828b3ce
  4. Affected versionversion=835d722ba10ac924adba1e8a46f2d80955222b4b <c51cfba50df8b9e16bfe0e6d4f2f252a4a10063d
  5. Affected versionversion=835d722ba10ac924adba1e8a46f2d80955222b4b <e33ce54cef5d429430e3b1ae5c8ee4f4103c4fdc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=835d722ba10ac924adba1e8a46f2d80955222b4b <4c365a0c21aaf2b8fcc88de8dc298803288f61ac; version=835d722ba10ac924adba1e8a46f2d80955222b4b <6746eae4bbaddcc16b40efb33dab79210828b3ce; version=835d722ba10ac924adba1e8a46f2d80955222b4b <c51cfba50df8b9e16bfe0e6d4f2f252a4a10063d; version=835d722ba10ac924adba1e8a46f2d80955222b4b <e33ce54cef5d429430e3b1ae5c8ee4f4103c4fdc

Published CVSS scores

5.5UbuntuCVSS: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

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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