USBX Heap Buffer Overread via Malicious MTP/PTP Device
CVE-2026-96402 Published on October 20, 2026
USBX PIMA/MTP host class reads past its receive buffer when a device over-reports its object handle count
A malicious USB MTP/PTP device can cause the USBX host to read past a heap buffer during ordinary object enumeration, leaking adjacent heap contents to the application or faulting on an unmapped page.
Vulnerability Analysis
CVE-2026-96402 is exploitable with physical access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.
Products Associated with CVE-2026-96402
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Affected Versions
Eclipse Foundation Eclipse ThreadX - USBX:- Before and including 6.5.1.202602 is affected.
- Version 6.5.2.202603 is unaffected.