CVE-2022-49772

Conditional kernel panic via spurious ALSA warning

Published May 1, 2025 · Updated May 11, 2026

Improper exception handling in the Linux ALSA USB-audio driver allows local users to trigger a kernel warning via malformed MIDI descriptors. snd_usbmidi_output_open() passes a valid NULL-port condition caused by skipped allocation to snd_BUG_ON(), which invokes the WARN path instead of returning the error normally. Triggering requires a malformed USB MIDI endpoint and opening its output; the warning panics the host only when panic_on_warn is enabled.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exception handling in the Linux ALSA USB-audio driver allows local users to trigger a kernel warning via malformed MIDI descriptors. snd_usbmidi_output_open() passes a valid NULL-port condition caused by skipped allocation to snd_BUG_ON(), which invokes the WARN path instead of returning the error normally. Triggering requires a malformed USB MIDI endpoint and opening its output; the warning panics the host only when panic_on_warn is enabled.

The record

CVE
CVE-2022-49772
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=4.15
  2. Affected versionversion=738d9edcfd44f154924692e54109fb439fcf8bdd <00f5f1bbf815a39e9eecb468d12ca55d3360eb10
  3. Affected versionversion=738d9edcfd44f154924692e54109fb439fcf8bdd <02b94885b2fdf1808b1874e009bfb90753f8f4db
  4. Affected versionversion=738d9edcfd44f154924692e54109fb439fcf8bdd <a80369c8ca50bc885d14386087a834659ec54a54
  5. Affected versionversion=738d9edcfd44f154924692e54109fb439fcf8bdd <ad72c3c3f6eb81d2cb189ec71e888316adada5df
  6. Affected versionversion=738d9edcfd44f154924692e54109fb439fcf8bdd <c43991065f36f7628cd124e037b8750c4617a7a7
  7. Affected versionversion=738d9edcfd44f154924692e54109fb439fcf8bdd <e7dc436aea80308a9268e6d2d85f910ff107de9b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=738d9edcfd44f154924692e54109fb439fcf8bdd <00f5f1bbf815a39e9eecb468d12ca55d3360eb10; version=738d9edcfd44f154924692e54109fb439fcf8bdd <02b94885b2fdf1808b1874e009bfb90753f8f4db; version=738d9edcfd44f154924692e54109fb439fcf8bdd <a80369c8ca50bc885d14386087a834659ec54a54; version=738d9edcfd44f154924692e54109fb439fcf8bdd <ad72c3c3f6eb81d2cb189ec71e888316adada5df; version=738d9edcfd44f154924692e54109fb439fcf8bdd <c43991065f36f7628cd124e037b8750c4617a7a7; version=738d9edcfd44f154924692e54109fb439fcf8bdd <e7dc436aea80308a9268e6d2d85f910ff107de9b

Published CVSS scores

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

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

T1529System Shutdown/Reboot

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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