CVE-2022-3903

System crash via incorrect USB read request

Published Nov 14, 2022 · Updated Apr 30, 2025

Denial of service in the Linux Kernel 6.1-rc5 mceusb driver allows physically proximate attackers to crash the system via a malicious USB device. In mceusb_gen1_init, the driver sends an endpoint-zero read request without setting USB_DIR_IN in bRequestType, producing an invalid pipe-direction warning. Exploitation requires physical attachment of a crafted USB transceiver, and the reported consequence is resource starvation or a kernel crash.

CVSS severity4.6
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux Kernel 6.1-rc5 mceusb driver allows physically proximate attackers to crash the system via a malicious USB device. In mceusb_gen1_init, the driver sends an endpoint-zero read request without setting USB_DIR_IN in bRequestType, producing an invalid pipe-direction warning. Exploitation requires physical attachment of a crafted USB transceiver, and the reported consequence is resource starvation or a kernel crash.

The record

CVE
CVE-2022-3903
Published
Nov 14, 2022
Updated
Apr 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-843, T1499.004
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 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=Linux kernel 6.1-rc5

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux kernel 6.1-rc5

Published CVSS scores

4.6NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1499.004Application or System Exploitation

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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