diff --git a/shared/tinyusb/mp_usbd_runtime.c b/shared/tinyusb/mp_usbd_runtime.c
index 7ff7dd4ab2..e10d1cb3f6 100644
--- a/shared/tinyusb/mp_usbd_runtime.c
+++ b/shared/tinyusb/mp_usbd_runtime.c
@@ -472,6 +472,8 @@ static void mp_usbd_disconnect(mp_obj_usb_device_t *usbd) {
     #if MICROPY_HW_USB_CDC
     // Ensure no pending static CDC writes, as these can cause TinyUSB to crash
     tud_cdc_write_clear();
+    // Prevent cdc write flush from initiating any new transfers while disconnecting
+    usbd_edpt_stall(USBD_RHPORT, USBD_CDC_EP_IN);
     #endif
 
     bool was_connected = tud_connected();