diff --git a/astlpc.c b/astlpc.c
index 455276d..df4e245 100644
--- a/astlpc.c
+++ b/astlpc.c
@@ -976,6 +976,7 @@
 static void mctp_astlpc_rx_start(struct mctp_binding_astlpc *astlpc)
 {
 	struct mctp_pktbuf *pkt;
+	struct mctp_hdr *hdr;
 	uint32_t body, packet;
 
 	mctp_astlpc_lpc_read(astlpc, &body, astlpc->layout.rx.offset,
@@ -1016,6 +1017,13 @@
 	if (!mctp_astlpc_kcs_send(astlpc, 0x2))
 		astlpc->layout.rx.state = buffer_state_released;
 
+	hdr = mctp_pktbuf_hdr(pkt);
+	if (hdr->ver != 1) {
+		mctp_pktbuf_free(pkt);
+		astlpc_prdebug(astlpc, "Dropped packet with invalid version");
+		return;
+	}
+
 	/*
 	 * v3 will validate the CRC32 in the medium-specific trailer and adjust
 	 * the packet size accordingly. On older protocols validation is a no-op