{
  "finding_id": "DF-3816",
  "status": "inconclusive",
  "reproduced": 0,
  "impact": "none",
  "confidence": "likely",
  "verdict": "Source-certain defects in the privileged dev.mpr.N.dump_reqs handler: it walks cm->cm_chain_list and reads cm state with no lock (mpr.c:1904-1922) while every other consumer mutates those lists under sc->mpr_lock (real UAF on the realloc path where sc->chains is kfreed, mpr.c:787-788), and copies fixed 128 bytes from request/chain frames whose sizes are device-reported and can be smaller (mpr.c:1918/1921 vs mpr.c:387/397-405) — OOB read past the req_frames/chain_frames DMA allocations. Runtime inconclusive: no controller on the guest, sysctl tree dev.mpr.* never instantiates (probe.log).",
  "exploit_chain": "",
  "evidence": "VERDICT.md trace; fix.diff (lock + min() clamps).",
  "kernel_refs": ["sys/dev/raid/mpr/mpr.c:1904", "sys/dev/raid/mpr/mpr.c:1918", "sys/dev/raid/mpr/mpr.c:1921"],
  "poc_changes": "No runnable PoC without hardware.",
  "attempts": 1,
  "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": 5,
  "guest_dirty": 0,
  "build_cmd": "",
  "run_cmd": "",
  "notes": "Privileged-only (SYSCAP_NODRIVER) — hardening-grade. Adjacent debug-print OOB reads of device-sized event data tracked separately as DF-3817.",
  "recommended_fix": "Hold mpr_lock across the dump walk and clamp each sbuf_bcat to the device-reported frame size.",
  "fix_status": "not_testable",
  "fix_baseline_reproduced": 0,
  "fix_patched_reproduced": 0,
  "fix_verdict": "No controller on guest; the sysctl node cannot be exercised in either kernel.",
  "fix_evidence": "fix.diff; probe.log."
}