{
  "finding_id": "DF-4301",
  "status": "untested",
  "reproduced": 0,
  "impact": "none",
  "confidence": "speculative",
  "verdict": "vkbd_term() discards kbd_unregister()s error and unconditionally frees the keyboard (vkbd.c:848-857); on the kbd.c EBUSY path (KBDIO_UNLOADING refused) this frees a still-registered, still-busy keyboard -> dangling keyboard[]/kbdsw[] + consumer UAF. Latent: no in-tree UNLOADING handler returns an error today.",
  "exploit_chain": "",
  "evidence": "VERDICT.md path trace (vkbd.c:848-857 vs kbd.c:268-277; kbdmux.c:206 / syscons.c:891 always return 0)",
  "kernel_refs": [
    "sys/dev/misc/vkbd/vkbd.c:848",
    "sys/dev/misc/kbd/kbd.c:268"
  ],
  "poc_changes": "n/a",
  "attempts": 0,
  "guest_uname": "DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 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,
  "fix_status": "untested",
  "fix_baseline_reproduced": 0,
  "fix_patched_reproduced": 0,
  "fix_verdict": "fix.diff authored; not buildable-triggerable (latent path)",
  "fix_evidence": "VERDICT.md diff",
  "build_cmd": "n/a",
  "run_cmd": "n/a",
  "code_hash": "",
  "notes": "Hardening of a lifetime-critical error path; pairs with the known DF-4297/DF-1601 kbd-framework teardown races.",
  "recommended_fix": "Honor kbd_unregister()s return in vkbd_term(): on error do not free."
}