diff --git a/subsys/bluetooth/controller/ll_sw/ull_conn_iso.c b/subsys/bluetooth/controller/ll_sw/ull_conn_iso.c
index 9602cadf551..e4f24cabd2f 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_conn_iso.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_conn_iso.c
@@ -314,7 +314,10 @@ void ull_conn_iso_done(struct node_rx_event_done *done)
 
 		if (cis->lll.handle != LLL_HANDLE_INVALID) {
 			/* CIS was setup and is now expected to be going */
-			if (!(done->extra.trx_performed_mask &
+			if (done->extra.mic_state == LLL_CONN_MIC_FAIL) {
+				/* MIC failure - stop CIS and defer cleanup to after teardown. */
+				ull_conn_iso_cis_stop(cis, NULL, BT_HCI_ERR_TERM_DUE_TO_MIC_FAIL);
+			} else if (!(done->extra.trx_performed_mask &
 			      (1U << LL_CIS_IDX_FROM_HANDLE(cis->lll.handle)))) {
 				/* We did NOT have successful transaction on established CIS,
 				 * or CIS was not yet established, so handle timeout