CVE-2025-22027

Local crash via Streamzap disconnect callback race

Published Apr 16, 2025 · Updated May 11, 2026

A race condition in the Linux kernel Streamzap driver allows local users to crash the system by disconnecting a Streamzap USB device. streamzap_disconnect() frees and nulls dev->raw through rc_unregister_device() before usb_kill_urb() finishes an in-progress streamzap_callback(), which then accesses the freed resource. Exploitation requires local access to a connected Streamzap receiver and precise overlap between device removal and the callback; the bounded consequence is a kernel fault and system crash.

CVSS severity4.7
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in the Linux kernel Streamzap driver allows local users to crash the system by disconnecting a Streamzap USB device. streamzap_disconnect() frees and nulls dev->raw through rc_unregister_device() before usb_kill_urb() finishes an in-progress streamzap_callback(), which then accesses the freed resource. Exploitation requires local access to a connected Streamzap receiver and precise overlap between device removal and the callback; the bounded consequence is a kernel fault and system crash.

The record

CVE
CVE-2025-22027
Published
Apr 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 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=2.6.36
  2. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <15483afb930fc2f883702dc96f80efbe4055235e
  3. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <30ef7cfee752ca318d5902cb67b60d9797ccd378
  4. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <4db62b60af2ccdea6ac5452fd20e29587ed85f57
  5. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <8760da4b9d44c36b93b6e4cf401ec7fe520015bd
  6. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <adf0ddb914c9e5b3e50da4c97959e82de2df75c3
  7. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <e11652a6514ec805440c1bb3739e6c6236fffcc7
  8. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <f1d518c0bad01abe83c2df880274cb6a39f4a457
  9. Affected versionversion=8e9e60640067858e8036d4d43bbf725c60613359 <f656cfbc7a293a039d6a0c7100e1c846845148c1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.36; version=8e9e60640067858e8036d4d43bbf725c60613359 <15483afb930fc2f883702dc96f80efbe4055235e; version=8e9e60640067858e8036d4d43bbf725c60613359 <30ef7cfee752ca318d5902cb67b60d9797ccd378; version=8e9e60640067858e8036d4d43bbf725c60613359 <4db62b60af2ccdea6ac5452fd20e29587ed85f57; version=8e9e60640067858e8036d4d43bbf725c60613359 <8760da4b9d44c36b93b6e4cf401ec7fe520015bd; version=8e9e60640067858e8036d4d43bbf725c60613359 <adf0ddb914c9e5b3e50da4c97959e82de2df75c3; version=8e9e60640067858e8036d4d43bbf725c60613359 <e11652a6514ec805440c1bb3739e6c6236fffcc7; version=8e9e60640067858e8036d4d43bbf725c60613359 <f1d518c0bad01abe83c2df880274cb6a39f4a457; version=8e9e60640067858e8036d4d43bbf725c60613359 <f656cfbc7a293a039d6a0c7100e1c846845148c1

Published CVSS scores

4.7CISA ADPCVSS:3.1/AV:L/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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