CVE-2022-39344Public exploitNetwork attack vector

Code execution via unchecked DFU upload length

Published Nov 4, 2022 · Updated Apr 22, 2025

Buffer overflow in Eclipse ThreadX USBX before 6.1.12 allows remote attackers to execute code through a crafted DFU UPLOAD request. In ux_device_class_dfu_control_request, the DFU_UPLOAD_IDLE branch passes an unchecked request length to ux_slave_class_dfu_read, overflowing the fixed control buffer. The target must expose USB device DFU upload functionality; successful corruption can overwrite memory, bypass security controls, or inject code into flash.

CVSS severity9.8
Critical
EPSS probability2.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Eclipse ThreadX USBX before 6.1.12 allows remote attackers to execute code through a crafted DFU UPLOAD request. In ux_device_class_dfu_control_request, the DFU_UPLOAD_IDLE branch passes an unchecked request length to ux_slave_class_dfu_read, overflowing the fixed control buffer. The target must expose USB device DFU upload functionality; successful corruption can overwrite memory, bypass security controls, or inject code into flash.

The record

CVE
CVE-2022-39344
Published
Nov 4, 2022
Updated
Apr 22, 2025
Vendor
The Eclipse Foundation
Product
Eclipse ThreadX USBX
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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=< 6.1.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse ThreadX USBXversion=< 6.1.12

Published CVSS scores

9.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

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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