diff --git a/feeds/ipq807x_v5.4/hostapd/src/src/ap/ubus.c b/feeds/ipq807x_v5.4/hostapd/src/src/ap/ubus.c
index bff01c172..468d210da 100644
--- a/feeds/ipq807x_v5.4/hostapd/src/src/ap/ubus.c
+++ b/feeds/ipq807x_v5.4/hostapd/src/src/ap/ubus.c
@@ -1958,6 +1958,9 @@ void hostapd_ubus_notify_radar_detected(struct hostapd_iface *iface, int frequen
 	struct hostapd_data *hapd;
 	int i;
 
+	if (!ctx)
+		return;
+
 	blob_buf_init(&b, 0);
 	blobmsg_add_u16(&b, "frequency", frequency);
 	blobmsg_add_u16(&b, "width", chan_width);
diff --git a/feeds/ipq95xx/hostapd/src/src/ap/ubus.c b/feeds/ipq95xx/hostapd/src/src/ap/ubus.c
index 8f0f8a16b..3ef443d43 100644
--- a/feeds/ipq95xx/hostapd/src/src/ap/ubus.c
+++ b/feeds/ipq95xx/hostapd/src/src/ap/ubus.c
@@ -1892,6 +1892,9 @@ void hostapd_ubus_notify_radar_detected(struct hostapd_iface *iface, int frequen
 	struct hostapd_data *hapd;
 	int i;
 
+	if (!ctx)
+		return;
+
 	blob_buf_init(&b, 0);
 	blobmsg_add_u16(&b, "frequency", frequency);
 	blobmsg_add_u16(&b, "width", chan_width);
diff --git a/feeds/wifi-ax/hostapd/src/src/ap/ubus.c b/feeds/wifi-ax/hostapd/src/src/ap/ubus.c
index cd152fd1a..db904f804 100644
--- a/feeds/wifi-ax/hostapd/src/src/ap/ubus.c
+++ b/feeds/wifi-ax/hostapd/src/src/ap/ubus.c
@@ -1958,6 +1958,9 @@ void hostapd_ubus_notify_radar_detected(struct hostapd_iface *iface, int frequen
 	struct hostapd_data *hapd;
 	int i;
 
+	if (!ctx)
+		return;
+
 	blob_buf_init(&b, 0);
 	blobmsg_add_u16(&b, "frequency", frequency);
 	blobmsg_add_u16(&b, "width", chan_width);
diff --git a/patches/0073-hostapd-add-missing-NULL-pointer-check-on-radar-noti.patch b/patches/0073-hostapd-add-missing-NULL-pointer-check-on-radar-noti.patch
new file mode 100644
index 000000000..8ec0666a0
--- /dev/null
+++ b/patches/0073-hostapd-add-missing-NULL-pointer-check-on-radar-noti.patch
@@ -0,0 +1,27 @@
+From 20bf17b6bb9c40a14db5ed9744c3362afe4a67d8 Mon Sep 17 00:00:00 2001
+From: John Crispin <john@phrozen.org>
+Date: Tue, 9 Jan 2024 12:36:01 +0100
+Subject: [PATCH] hostapd: add missing NULL pointer check on radar notification
+
+Signed-off-by: John Crispin <john@phrozen.org>
+---
+ package/network/services/hostapd/src/src/ap/ubus.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/package/network/services/hostapd/src/src/ap/ubus.c b/package/network/services/hostapd/src/src/ap/ubus.c
+index 52f83c50f7..54361ea460 100644
+--- a/package/network/services/hostapd/src/src/ap/ubus.c
++++ b/package/network/services/hostapd/src/src/ap/ubus.c
+@@ -2125,6 +2125,9 @@ void hostapd_ubus_notify_radar_detected(struct hostapd_iface *iface, int frequen
+ 	struct hostapd_data *hapd;
+ 	int i;
+ 
++	if (!ctx)
++		return;
++
+ 	blob_buf_init(&b, 0);
+ 	blobmsg_add_u16(&b, "frequency", frequency);
+ 	blobmsg_add_u16(&b, "width", chan_width);
+-- 
+2.34.1
+