CVE-2022-50400

Local debugfs disruption via wrong DAPM cleanup

Published Sep 18, 2025 · Updated Sep 18, 2025

Resource-management flaw in affected Linux kernel releases allows local users to disrupt debugfs through Greybus audio teardown. gbaudio_dapm_free_controls performs a null-parent debugfs lookup and removes the result even though the sound core owns that entry. The Greybus audio path must execute with debugfs enabled; cleanup can leak memory or remove all system debugfs entries, causing availability loss.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-management flaw in affected Linux kernel releases allows local users to disrupt debugfs through Greybus audio teardown. gbaudio_dapm_free_controls performs a null-parent debugfs lookup and removes the result even though the sound core owns that entry. The Greybus audio path must execute with debugfs enabled; cleanup can leak memory or remove all system debugfs entries, causing availability loss.

The record

CVE
CVE-2022-50400
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4dab0d27a4211a27135a6899d6c737e6e0759a11
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5699afbff1fa2972722e863906c0320d55dd4d58
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d0febad83e29d85bb66e4f5cac0115b022403338
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d517cdeb904ddc0cbebcc959d43596426cac40b0
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d835fa49d9589a780ff0d001bb7e6323238a4afb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4dab0d27a4211a27135a6899d6c737e6e0759a11; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5699afbff1fa2972722e863906c0320d55dd4d58; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d0febad83e29d85bb66e4f5cac0115b022403338; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d517cdeb904ddc0cbebcc959d43596426cac40b0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d835fa49d9589a780ff0d001bb7e6323238a4afb

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

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-401Missing Release of Memory after Effective Lifetime

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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