| Segment | Expansion | Interpretation | |---------|-------------------------|-----------------------------------------------------| | pp | Platform Profile | Target device class or host controller profile | | var | Variable | Focus on variable fields in USB descriptors/transfers | | usb | Universal Serial Bus | Protocol layer under test | | rvp | Runtime Verification Point | Check at execution, not static analysis |

| Mutation | Device Response | Root Cause | |------------------------------|--------------------------------------|--------------------------------------| | wLength = descriptor_size + 1| Partial data + 5‑second freeze | Missing length check in memcpy | | wValue = invalid request | STALL correctly | – | | wIndex pointing to freed ep | Device reset | Use‑after‑free in endpoint close |

The token breaks down as follows:

1. Identifier Overview Designation: pp‑var‑usb‑rvp Type: Internal research / test case identifier Domain: USB protocol fuzzing, variable manipulation, runtime verification Status: Active (lab environment)