CVE-2022-50773

Kernel panic via uninitialized MTS64 interrupt pointer

Published Dec 24, 2025 · Updated Dec 24, 2025

NULL-pointer dereference in the Linux ALSA MTS64 driver allows local users with module-loading access to trigger a kernel panic. During a failed snd_mts64 probe, snd_mts64_interrupt dereferences the uninitialized mts device pointer when a parallel-port interrupt arrives. Reachability requires the MTS64 and parallel-port drivers plus privileged module-loading access; repeated module insertion can panic and reboot the host.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
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 ALSA MTS64 driver allows local users with module-loading access to trigger a kernel panic. During a failed snd_mts64 probe, snd_mts64_interrupt dereferences the uninitialized mts device pointer when a parallel-port interrupt arrives. Reachability requires the MTS64 and parallel-port drivers plus privileged module-loading access; repeated module insertion can panic and reboot the host.

The record

CVE
CVE-2022-50773
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1529
Attack vector
local
Privileges
admin

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=2.6.19
  2. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <0649129359219ce6ff380ec401f87308485c6ae3
  3. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <06ec592389f2be3199779ab823c4323dcfd2121f
  4. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <1a763c748acd5540ccc43306c57c9c6c5fb60884
  5. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <250eed7b9994d79f9c409f954dbd08e88f5afd83
  6. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <7e91667db38abb056da5a496d40fbd044c66bed2
  7. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <b471fe61da523a15e4cb60fa81f5a2377e4bad98
  8. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <c7e9624d90bf20f1eed6b228949396d614b94020
  9. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <cba633b24a98d957e8190ef8bc4d4cdb4f6e9313
  10. Affected versionversion=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <cf2ea3c86ad90d63d1c572b43e1ca9276b0357ad

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.19; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <0649129359219ce6ff380ec401f87308485c6ae3; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <06ec592389f2be3199779ab823c4323dcfd2121f; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <1a763c748acd5540ccc43306c57c9c6c5fb60884; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <250eed7b9994d79f9c409f954dbd08e88f5afd83; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <7e91667db38abb056da5a496d40fbd044c66bed2; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <b471fe61da523a15e4cb60fa81f5a2377e4bad98; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <c7e9624d90bf20f1eed6b228949396d614b94020; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <cba633b24a98d957e8190ef8bc4d4cdb4f6e9313; version=68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad <cf2ea3c86ad90d63d1c572b43e1ca9276b0357ad

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1529System Shutdown/Reboot

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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