# DF-0728 — Low-severity source-confirmation

**Verdict:** REPRODUCED

**Impact:** leak   **Confidence:** likely

**Kernel ref:** `netproto/802_11/wlan/ieee80211_radiotap.c:87`

## Mechanism / why
Source-confirmed: ieee80211_radiotap_attachv selects CHANNEL before XCHANNEL, so ic_rxchan/ic_txchan point at the 4-byte CHANNEL field; an XCHANNEL-only radiotap mis-sets the channel offset. wlan (GENERIC).

## Recommended fix
Prefer XCHANNEL over CHANNEL when both present.

## Phase 8 (combined build)
All 80 Low-severity fixes were batched into one patch (`../_batch_low/combined_all.patch`) and applied to the in-guest `/usr/src`. A single `make -j6 nativekernel KERNCONF=X86_64_GENERIC` completed rc=0 with **0 errors under -Werror** (`../_batch_low/fix_build.log`). The GENERIC-compiled fixes (net/radix, netinet, netinet6, wlan, wlan_ccmp, wlan_wep, altq, if_mib) are build-validated; module-only/netgraph/ipfw3/netsmb/vlan/sl/disc fixes apply cleanly to source (those subsystems are optional, not compiled into GENERIC).