{
  "finding_id": "DF-5296",
  "status": "untested",
  "verdict": "untested (Low hardening; needs attacker-controlled PCI hardware; no UHCI controller on current guest)",
  "reproduced": false,
  "impact": "silent cross-device port-I/O register corruption (max 12B excursion)",
  "confidence": "certain",
  "exploit_chain": "",
  "evidence": "static trace: sc_io_size never consulted by UREAD/UWRITE (grep-verified)",
  "kernel_refs": [
    "sys/bus/u4b/controller/uhci.c:99",
    "sys/bus/u4b/controller/uhci_pci.c:269"
  ],
  "poc_changes": "",
  "attempts": 0,
  "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul 2 06:02:54 UTC 2026 root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64",
  "runtime_sec": 0,
  "guest_dirty": 0,
  "build_cmd": "n/a",
  "run_cmd": "n/a",
  "code_hash": "",
  "notes": "Low; Phase V per contract",
  "recommended_fix": "reject sc_io_size < 0x14 at attach; gate detach reset on sc_didinit",
  "fix_status": "not_testable",
  "fix_baseline_reproduced": 0,
  "fix_patched_reproduced": 0,
  "fix_verdict": "",
  "fix_evidence": ""
}