diff --git a/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/cpu.h b/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/cpu.h
index cad5b4c7534..760789e0f21 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/cpu.h
+++ b/subsys/bluetooth/controller/ll_sw/nordic/hal/nrf5/cpu.h
@@ -16,12 +16,25 @@ static inline void cpu_sleep(void)
 #endif
 }
 
-static inline void cpu_dsb(void)
+static inline void cpu_dmb(void)
 {
-#if defined(CONFIG_CPU_CORTEX_M0) || defined(CONFIG_ARCH_POSIX)
-	/* No need of data synchronization barrier */
-#elif defined(CONFIG_CPU_CORTEX_M4) || defined(CONFIG_CPU_CORTEX_M33)
-	__DSB();
+#if defined(CONFIG_CPU_CORTEX_M)
+	/* NOTE: Refer to ARM Cortex-M Programming Guide to Memory Barrier
+	 *       Instructions, Section 4.1 Normal access in memories
+	 *
+	 *       Implementation: In the Cortex-M processors data transfers are
+	 *       carried out in the programmed order.
+	 *
+	 * Hence, there is no need to use a memory barrier instruction between
+	 * each access. Only a compiler memory clobber is sufficient.
+	 */
+	__asm__ volatile ("" : : : "memory");
+#elif defined(CONFIG_ARCH_POSIX)
+	/* FIXME: Add necessary host machine required Data Memory Barrier
+	 *        instruction alongwith the below defined compiler memory
+	 *        clobber.
+	 */
+	__asm__ volatile ("" : : : "memory");
 #else
 #error "Unsupported CPU."
 #endif
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c
index f51312a8a4e..dd59df5ed60 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c
@@ -223,7 +223,7 @@ struct pdu_adv *lll_adv_pdu_alloc(struct lll_adv_pdu *pdu, uint8_t *idx)
 		uint8_t first_latest;
 
 		pdu->last = first;
-		cpu_dsb();
+		cpu_dmb();
 		first_latest = pdu->first;
 		if (first_latest != first) {
 			last++;
diff --git a/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c b/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c
index af6821774e3..db7116cecbb 100644
--- a/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c
+++ b/subsys/bluetooth/controller/ll_sw/openisa/lll/lll_adv.c
@@ -214,11 +214,11 @@ struct pdu_adv *lll_adv_pdu_alloc(struct lll_adv_pdu *pdu, uint8_t *idx)
 		pdu->last = first;
 		/* FIXME: Ensure that data is synchronized so that an ISR
 		 *        vectored, after pdu->last has been updated, does
-		 *        access the latest value. __DSB() is used in ARM
+		 *        access the latest value. __DMB() is used in ARM
 		 *        Cortex M4 architectures. Use appropriate
 		 *        instructions on other platforms.
 		 *
-		 *        cpu_dsb();
+		 *        cpu_dmb();
 		 */
 		first_latest = pdu->first;
 		if (first_latest != first) {