CVE-2024-27072

System hang via redundant USBTV teardown locks

Published May 1, 2024 · Updated May 12, 2026

Improper locking in the Linux USBTV video driver on Linux and Siemens TM MFP systems allows local users to cause a system hang. The usbtv_video_free() teardown path redundantly acquires vb2q_lock and v4l2_lock and calls usbtv_stop() before device unregistration, allowing cleanup to deadlock. Triggering the hang requires a USBTV device and local ability to disconnect it; disconnection while streaming reaches older affected kernels, while the later regression also exposes idle disconnection.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux USBTV video driver on Linux and Siemens TM MFP systems allows local users to cause a system hang. The usbtv_video_free() teardown path redundantly acquires vb2q_lock and v4l2_lock and calls usbtv_stop() before device unregistration, allowing cleanup to deadlock. Triggering the hang requires a USBTV device and local ability to disconnect it; disconnection while streaming reaches older affected kernels, while the later regression also exposes idle disconnection.

The record

CVE
CVE-2024-27072
Published
May 1, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-667
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=3.11; version=f3d27f34fdd7701e499617d2c1d94480a98f6d07 <3e7d82ebb86e94643bdb30b0b5b077ed27dce1c2; version=f3d27f34fdd7701e499617d2c1d94480a98f6d07 <4ec4641df57cbdfdc51bb4959afcdbcf5003ddb9; version=f3d27f34fdd7701e499617d2c1d94480a98f6d07 <65e6a2773d655172143cc0b927cdc89549842895; version=f3d27f34fdd7701e499617d2c1d94480a98f6d07 <bdd82c47b22a8befd617b723098b2a41b77373c7; version=f3d27f34fdd7701e499617d2c1d94480a98f6d07 <d5ed208d04acf06781d63d30f9fa991e8d609ebd; version=f3d27f34fdd7701e499617d2c1d94480a98f6d07 <dea46e246ef0f98d89d59a4229157cd9ffb636bf

Published CVSS scores

5.5Oracle LinuxCVSS: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-667Improper Locking

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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