diff --git a/src/ble/ble_service.c b/src/ble/ble_service.c
index 2f51d10..41cef7f 100644
--- a/src/ble/ble_service.c
+++ b/src/ble/ble_service.c
@@ -806,11 +806,23 @@ int ble_dfu_advertising_enable(void)
     return ble_advertising_start();
 }
 
+/* DFU 진입용 disconnect */
 bool ble_dfu_advertising_is_enabled(void)
 {
     return dfu_advertising_mode;
 }
 
+/* DFU watchdog */
+int ble_disconnect_active(void)
+{
+    if (current_conn == NULL)
+    {
+        return -ENOTCONN;
+    }
+
+    return bt_conn_disconnect(current_conn, BT_HCI_ERR_REMOTE_USER_TERM_CONN);
+}
+
 int ble_data_send(const uint8_t *data, uint16_t len)
 {
     int err;
diff --git a/src/ble/ble_service.h b/src/ble/ble_service.h
index bfbf847..18aae4f 100644
--- a/src/ble/ble_service.h
+++ b/src/ble/ble_service.h
@@ -34,5 +34,6 @@ int ble_data_send(const uint8_t *data, uint16_t len);
 int ble_dfu_advertising_enable(void);
 bool ble_dfu_advertising_is_enabled(void);
 bool ble_is_connected(void);
+int ble_disconnect_active(void);
 
 #endif /* BLE_SERVICE_H__ */
diff --git a/src/main.c b/src/main.c
index 18b3381..9db365f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -31,6 +31,7 @@ LOG_MODULE_REGISTER(vesiscan, LOG_LEVEL_INF);
 #define BLE_CMD_WORKQ_STACK_SZ  8192
 #define DFU_RESUME_MAGIC        0xD5U
 #define DFU_RESUME_GPREGRET_REG 1U
+#define DFU_STALL_TIMEOUT_SEC   30      // DFU 업로드 무진행 시 강제 disconnect 임계
 #define IMG_MGMT_ID_STATE       0U
 #define IMG_MGMT_ID_UPLOAD      1U
 /*
@@ -88,6 +89,8 @@ static struct k_work bond_reset_work;       // 전원 버튼 15초 롱프레스
 static bool dfu_led_active;                 // DFU 업로드 중 초록 LED ON
 static const char *power_off_pending_reason = "none";
 static bool bond_reset_pending;             // 본드 삭제 work 중복 예약 방지
+static struct k_work_delayable dfu_watchdog_work;   // DFU 업로드 무진행 감시 work
+static void dfu_watchdog_handler(struct k_work *work);
 
 static enum mgmt_cb_return dfu_status_cb(uint32_t event,
                                          enum mgmt_cb_return prev_status,
@@ -524,6 +527,9 @@ static void timers_init(void)
     // 전원 버튼 15초 롱프레스 본드 삭제 work
     k_work_init(&bond_reset_work, bond_reset_work_handler);
 
+    // DFU 업로드 무진행 감시 work
+    k_work_init_delayable(&dfu_watchdog_work, dfu_watchdog_handler);
+
     // BLE 명령 처리 work queue
     k_work_init(&ble_cmd_work, ble_cmd_work_handler);
     k_work_queue_start(&ble_cmd_work_q, ble_cmd_workq_stack, K_THREAD_STACK_SIZEOF(ble_cmd_workq_stack), BLE_CMD_WORKQ_PRIORITY, NULL);
@@ -544,13 +550,21 @@ static void timers_start(void)
     k_timer_start(&m_power_on_delay_timer, K_MSEC(POWER_ON_DELAY), K_NO_WAIT);
 }
 
-static enum mgmt_cb_return dfu_status_cb(uint32_t event,
-                                         enum mgmt_cb_return prev_status,
-                                         int32_t *rc,
-                                         uint16_t *group,
-                                         bool *abort_more,
-                                         void *data,
-                                         size_t data_size)
+/* DFU 업로드가 멈춘 채(청크 무진행) 링크만 살아있는 경우, 연결을 강제로 끊어
+ * SMP 재광고(10분 타임아웃)로 전환한다. 초록 LED 무한 점등/무한 대기 방지. */
+static void dfu_watchdog_handler(struct k_work *work)
+{
+    ARG_UNUSED(work);
+
+    if (ble_is_connected())
+    {
+        DBG_PRINTF("[DFU] upload stalled (%ds), forcing disconnect\r\n",
+                   DFU_STALL_TIMEOUT_SEC);
+        (void)ble_disconnect_active();
+    }
+}
+
+static enum mgmt_cb_return dfu_status_cb(uint32_t event, enum mgmt_cb_return prev_status, int32_t *rc, uint16_t *group, bool *abort_more, void *data, size_t data_size)
 {
     ARG_UNUSED(prev_status);
     ARG_UNUSED(rc);
@@ -563,19 +577,19 @@ static enum mgmt_cb_return dfu_status_cb(uint32_t event,
     {
         case MGMT_EVT_OP_IMG_MGMT_DFU_STARTED:
         case MGMT_EVT_OP_IMG_MGMT_DFU_CHUNK:
-            // DFU 업로드 중에는 초록 LED ON
             dfu_led_active = true;
-            led_ble_solid();
+            led_ble_solid(); // DFU 업로드 중에는 초록 LED ON
+            // 청크가 올 때마다 무진행 감시 타이머 리셋
+            k_work_reschedule(&dfu_watchdog_work, K_SECONDS(DFU_STALL_TIMEOUT_SEC));
             break;
 
         case MGMT_EVT_OP_IMG_MGMT_DFU_PENDING:
-            // 업로드 완료 후 리셋 전까지 초록 LED ON
             dfu_led_active = true;
-            led_ble_solid();
+            led_ble_solid(); // 업로드 완료 후 리셋 전까지 초록 LED ON
+            k_work_cancel_delayable(&dfu_watchdog_work); // 업로드 완료: 감시 종료
 
-            // DFU 리셋 후 버튼 없이 전원 ON
 #if NRF_POWER_HAS_GPREGRET
-        nrf_power_gpregret_set(NRF_POWER, DFU_RESUME_GPREGRET_REG, DFU_RESUME_MAGIC);
+        nrf_power_gpregret_set(NRF_POWER, DFU_RESUME_GPREGRET_REG, DFU_RESUME_MAGIC); // DFU 리셋 후 버튼 없이 전원 ON
 #endif
         break;