Code execution via unchecked USB packet lengths
Published Dec 5, 2023 · Updated May 29, 2025
Out-of-bounds writes in USBX before 6.3.0 allow physically proximate attackers to execute code through CDC ECM or RNDIS traffic. The host and device class receive paths process CDC ECM and RNDIS packet lengths without adequate bounds validation, allowing writes outside intended buffers. Exploitation requires physical access to a USB interface and can compromise confidentiality and integrity beyond the USBX component.
Summary
What happened
Out-of-bounds writes in USBX before 6.3.0 allow physically proximate attackers to execute code through CDC ECM or RNDIS traffic. The host and device class receive paths process CDC ECM and RNDIS packet lengths without adequate bounds validation, allowing writes outside intended buffers. Exploitation requires physical access to a USB interface and can compromise confidentiality and integrity beyond the USBX component.
The record
- CVE
- CVE-2023-48695
- Published
- Dec 5, 2023
- Updated
- May 29, 2025
- Vendor
- The Eclipse Foundation
- Product
- Eclipse ThreadX USBX
- Classifications
- CWE-787, T1200
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 5, 2023CVE publishedPublication date reported by the CVE source.
- May 29, 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.
- Affected versionversion=< 6.3.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
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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