{
 "finding_id": "DF-3464",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "certain",
 "verdict": "Line-accurate confirmation of all three sites (register at ieee80211_action.c:83-115 checks only act >= nitems() - a negative int act writes a function pointer BELOW the table; the send dispatch at :127-152 checks only act < nitems() - a negative act reads+tail-calls below the table; recv_action_register mirrors the register shape at :182-215). No runtime demonstration: on-air frames cannot supply negative values (ia_action is uint8_t and bounded) and every in-tree caller passes small constants - this is a kernel-internal API contract hazard. Fix adds two-sided checks at all sites; compiled in the F40FIX build.",
 "exploit_chain": "",
 "evidence": "VERDICT.md with path:line citations; run.log where a live demo exists; fix.diff",
 "kernel_refs": [
  "sys/netproto/802_11/wlan/ieee80211_action.c:83",
  "sys/netproto/802_11/wlan/ieee80211_action.c:127",
  "sys/netproto/802_11/wlan/ieee80211_action.c:182"
 ],
 "poc_changes": "n/a - no negative-act caller exists",
 "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": 30,
 "guest_dirty": 0,
 "build_cmd": "see build.sh",
 "run_cmd": "see run.sh",
 "code_hash": null,
 "notes": "",
 "recommended_fix": "two-sided act bounds in send/recv register helpers and the send dispatch",
 "fix_status": "compile_validated",
 "fix_verdict": "fix.diff applied in the F40FIX verification kernel build (RC=0, zero -Werror errors); no runtime A/B for this item (line-certain hardening)"
}