{
 "finding_id": "DF-3390",
 "status": "not_reproduced",
 "reproduced": 0,
 "impact": "none",
 "confidence": "certain",
 "verdict": "Line-accurate confirmation; a timing side-channel measurement is not meaningfully demonstrable on this rig (and the accept/reject oracle already exists). noise_consume_initiation compares the decrypted TAI64N timestamp with plain memcmp (wg_noise.c:1143) while the same file uses timingsafe_bcmp for public-key/psk comparisons (:503, :651, :1499); OpenBSD hardened this site to fixedtime_bcmp. Functionally correct (big-endian lexicographic == numeric) - defense-in-depth only. Fix adds a constant-time sign-compare helper (noise_tai64n_cmp); compile-validated by building sys/net/wg against the patched tree (module build; wg is not in the F40FIX kernel).",
 "exploit_chain": "",
 "evidence": "VERDICT.md with path:line citations; run.log where a live demo exists; fix.diff",
 "kernel_refs": [
  "sys/net/wg/wg_noise.c:1143",
  "sys/net/wg/wg_noise.c:503"
 ],
 "poc_changes": "n/a - timing channel, no runnable demonstration",
 "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": 15,
 "guest_dirty": 0,
 "build_cmd": "see build.sh",
 "run_cmd": "see run.sh",
 "code_hash": null,
 "notes": "",
 "recommended_fix": "constant-time noise_tai64n_cmp() replaces memcmp at the replay check",
 "fix_status": "compile_validated",
 "fix_verdict": "compile-validated by building sys/net/wg from the patched tree (if_wg.ko, rc=0, zero errors). No runtime A/B (timing channel)."
}