diff --git a/src/drivers/driver_nl80211_event.c b/src/drivers/driver_nl80211_event.c
index abe90e984..aadefc7b7 100644
--- a/src/drivers/driver_nl80211_event.c
+++ b/src/drivers/driver_nl80211_event.c
@@ -1303,6 +1303,14 @@ static void mlme_event_ch_switch(struct wpa_driver_nl80211_data *drv,
 			return;
 	}
 
+	if (link && is_ap_interface(drv->nlmode) &&
+	    !nl80211_link_valid(bss->valid_links, data.ch_switch.link_id)) {
+		wpa_printf(MSG_WARNING,
+			   "nl80211: Unknown link ID (%d) for channel switch (%s), ignoring",
+			   data.ch_switch.link_id, bss->ifname);
+		return;
+	}
+
 	drv->assoc_freq = data.ch_switch.freq;
 
 	wpa_supplicant_event(bss->ctx, finished ?