diff --git a/components/cast_streaming/browser/cast_streaming_session.cc b/components/cast_streaming/browser/cast_streaming_session.cc
index 59224cb0d55ad..09f6a35b4fb0b 100644
--- a/components/cast_streaming/browser/cast_streaming_session.cc
+++ b/components/cast_streaming/browser/cast_streaming_session.cc
@@ -417,6 +417,11 @@ void CastStreamingSession::ReceiverSessionClient::OnReceiversDestroying(
     playback_command_dispatcher_->OnRemotingSessionEnded();
   }
 
+  // Any deferred StartStreamingSession() callback binds raw_ptr<Receiver> to
+  // the receivers that are about to be freed; drop it to avoid a UAF when the
+  // pending Flush() completes.
+  start_session_cb_.Reset();
+
   preloaded_audio_buffer_ = std::nullopt;
   preloaded_video_buffer_ = std::nullopt;