diff --git a/drivers/usbdev/cdcacm.c b/drivers/usbdev/cdcacm.c
index 4e4c9da12b3..31a8d868a85 100644
--- a/drivers/usbdev/cdcacm.c
+++ b/drivers/usbdev/cdcacm.c
@@ -868,6 +868,16 @@ errout_with_flags:
 
 static void cdcacm_resetconfig(FAR struct cdcacm_dev_s *priv)
 {
+  /* When the USB is pulled out, if there is an unprocessed buffer,
+   * it needs to be push them to upper half serial drivers RX buffer.
+   */
+
+  if (priv->nrdq != 0)
+    {
+      cdcacm_release_rxpending(priv);
+      priv->nrdq = 0;
+    }
+
   /* Are we configured? */
 
   if (priv->config != CDCACM_CONFIGIDNONE)