CVE-2025-55100
Published: 17 October 2025
Summary
CVE-2025-55100 is a low-severity Out-of-bounds Read (CWE-125) vulnerability in Eclipse Threadx Usbx. Its CVSS base score is 2.4 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 31.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2025-55100 affects USBX before version 6.4.3, the USB support module for the Eclipse Foundation's ThreadX real-time operating system. The vulnerability is a potential out-of-bounds read issue in the function _ux_host_class_audio10_sam_parse_func() when parsing a list of sampling frequencies. Classified as CWE-125 (Out-of-bounds Read), it received a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H) upon publication on 2025-10-17.
Remote attackers can exploit this vulnerability over the network with low complexity, requiring no privileges, authentication, or user interaction. Exploitation leads to high confidentiality and availability impacts, potentially allowing sensitive information disclosure via memory reads or denial-of-service through application crashes, while integrity remains unaffected.
The GitHub security advisory (GHSA-j253-w29r-9m48) at https://github.com/eclipse-threadx/usbx/security/advisories/GHSA-j253-w29r-9m48 details the issue, with mitigation achieved by upgrading to USBX 6.4.3 or later.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-34864
Vulnerability details
In USBX before 6.4.3, the USB support module for Eclipse Foundation ThreadX, there was a potential out of bound read issue in _ux_host_class_audio10_sam_parse_func() when parsing a list of sampling frequencies.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote, unauthenticated network exploitation of a public-facing USB parser vulnerability enabling information disclosure and DoS.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates the out-of-bounds read vulnerability by requiring timely flaw remediation through upgrading USBX to version 6.4.3 or later.
Requires validation of format, type, range, and length of USB audio sampling frequency list inputs to prevent out-of-bounds reads in the parsing function.
Implements memory protections such as address space isolation to prevent unauthorized disclosure or crashes from out-of-bounds reads in USBX.