Code execution via oversized USB DFU transfer
Published Sep 23, 2022 · Updated May 12, 2026
Heap-based buffer overflow in U-Boot 2022.07 and earlier allows physically proximate attackers to read or overwrite heap data via USB DFU. In drivers/usb/gadget/f_dfu.c, handle_dnload returns the packet's wLength without bounding it to the 4096-byte req->buf, while dfu_handle also accepts a direction inconsistent with the command. Exploitation requires physical USB access and a device operating in DFU mode with DFU-over-USB support; memory disclosure, corruption, and code execution can result.
Summary
What happened
Heap-based buffer overflow in U-Boot 2022.07 and earlier allows physically proximate attackers to read or overwrite heap data via USB DFU. In drivers/usb/gadget/f_dfu.c, handle_dnload returns the packet's wLength without bounding it to the 4096-byte req->buf, while dfu_handle also accepts a direction inconsistent with the command. Exploitation requires physical USB access and a device operating in DFU mode with DFU-over-USB support; memory disclosure, corruption, and code execution can result.
The record
- CVE
- CVE-2022-2347
- Published
- Sep 23, 2022
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- RUGGEDCOM ROX RX1500
- Classifications
- CWE-122
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 23, 2022CVE publishedPublication date reported by the CVE source.
- 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?
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- Affected versionversion=0 <V2.17.1
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What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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