diff --git a/apps/auracast/src/main.c b/apps/auracast/src/main.c
index 3e7349ec89..f3602b87c0 100644
--- a/apps/auracast/src/main.c
+++ b/apps/auracast/src/main.c
@@ -203,6 +203,7 @@ base_create()
         return BLE_HS_ENOMEM;
     }
 
+    memset(bis_left, 0, sizeof *bis_left);
     bis_left->codec_spec_config = os_memblock_get(&codec_spec_pool);
     memcpy(bis_left->codec_spec_config,
            codec_spec_config_left_chan,
@@ -215,6 +216,7 @@ base_create()
         return BLE_HS_ENOMEM;
     }
 
+    memset(bis_right, 0, sizeof *bis_right);
     bis_right->codec_spec_config = os_memblock_get(&codec_spec_pool);
     memcpy(bis_right->codec_spec_config,
            codec_spec_config_right_chan,
@@ -230,6 +232,7 @@ base_create()
         return BLE_HS_ENOMEM;
     }
 
+    memset(bis, 0, sizeof *bis);
     bis->codec_spec_config = os_memblock_get(&codec_spec_pool);
     memcpy(bis->codec_spec_config,
            codec_spec_config,
diff --git a/apps/btshell/src/main.c b/apps/btshell/src/main.c
index f29b98f75c..d83e53cc0f 100644
--- a/apps/btshell/src/main.c
+++ b/apps/btshell/src/main.c
@@ -2329,6 +2329,7 @@ btshell_l2cap_coc_add(uint16_t conn_handle, struct ble_l2cap_chan *chan)
         return ENOMEM;
     }
 
+    memset(coc, 0, sizeof *coc);
     coc->chan = chan;
 
     prev = NULL;
@@ -2812,6 +2813,7 @@ btshell_broadcast_base_add(uint8_t adv_instance, uint32_t presentation_delay)
         return ENOMEM;
     }
 
+    memset(base, 0, sizeof *base);
     free_base_idx = btshell_base_find_free();
     if (free_base_idx < 0) {
         return ENOMEM;
@@ -2844,6 +2846,7 @@ btshell_broadcast_big_sub_add(uint8_t adv_instance,
         return ENOMEM;
     }
 
+    memset(big_sub, 0, sizeof *big_sub);
     base = btshell_base_find(adv_instance);
     if (!base) {
         os_memblock_put(&btshell_big_sub_pool, big_sub);
@@ -2856,6 +2859,7 @@ btshell_broadcast_big_sub_add(uint8_t adv_instance,
             os_memblock_put(&btshell_big_sub_pool, big_sub);
             return ENOMEM;
         }
+        memset(new_metadata, 0, sizeof *new_metadata);
         memcpy(new_metadata, metadata, metadata_len);
     }
 
@@ -2866,6 +2870,7 @@ btshell_broadcast_big_sub_add(uint8_t adv_instance,
             os_memblock_put(&btshell_metadata_pool, new_metadata);
             return ENOMEM;
         }
+        memset(new_codec_spec_cfg, 0, sizeof *new_codec_spec_cfg);
         memcpy(new_codec_spec_cfg, codec_spec_cfg, codec_spec_cfg_len);
     }
 
@@ -2915,12 +2920,15 @@ btshell_broadcast_bis_add(uint8_t adv_instance,
         return ENOMEM;
     }
 
+    memset(bis, 0, sizeof *bis);
+
     if (codec_spec_cfg_len > 0) {
         new_codec_spec_cfg = os_memblock_get(&btshell_codec_spec_pool);
         if (!new_codec_spec_cfg) {
             os_memblock_put(&btshell_bis_pool, bis);
             return ENOMEM;
         }
+        memset(new_codec_spec_cfg, 0, sizeof *new_codec_spec_cfg);
         memcpy(new_codec_spec_cfg, codec_spec_cfg, codec_spec_cfg_len);
     }
 
@@ -2962,6 +2970,8 @@ btshell_broadcast_create(uint8_t adv_instance,
         return ENOMEM;
     }
 
+    memset(big_params_ptr, 0, sizeof *big_params_ptr);
+
     *big_params_ptr = big_params;
 
     create_params.base = base;
diff --git a/nimble/host/src/ble_audio_broadcast.c b/nimble/host/src/ble_audio_broadcast.c
index b3ec29ce21..9090a9755d 100644
--- a/nimble/host/src/ble_audio_broadcast.c
+++ b/nimble/host/src/ble_audio_broadcast.c
@@ -136,6 +136,7 @@ ble_audio_broadcast_create(const struct ble_broadcast_create_params *params,
 
     broadcast = os_memblock_get(&ble_audio_broadcast_pool);
 
+    memset(broadcast, 0, sizeof *broadcast);
     broadcast->adv_instance = params->adv_instance;
     broadcast->base = params->base;
     broadcast->big_params = params->big_params;
diff --git a/nimble/host/src/ble_eatt.c b/nimble/host/src/ble_eatt.c
index de1c0d7153..70cbe4305a 100644
--- a/nimble/host/src/ble_eatt.c
+++ b/nimble/host/src/ble_eatt.c
@@ -181,6 +181,7 @@ ble_eatt_alloc(void)
         SLIST_INSERT_HEAD(&g_ble_eatt_list, eatt, next);
     }
 
+    memset(eatt, 0, sizeof *eatt);
     eatt->conn_handle = BLE_HS_CONN_HANDLE_NONE;
     eatt->chan = NULL;
     eatt->client_op = 0;
diff --git a/nimble/host/src/ble_gatts.c b/nimble/host/src/ble_gatts.c
index bf50305f4f..54f4ca4a2f 100644
--- a/nimble/host/src/ble_gatts.c
+++ b/nimble/host/src/ble_gatts.c
@@ -1250,6 +1250,7 @@ ble_gatts_start(void)
         goto done;
     }
 
+    memset(ble_gatts_clt_cfgs, 0, sizeof *ble_gatts_clt_cfgs);
     /* Fill the cache. */
     idx = 0;
     ha = NULL;
diff --git a/nimble/host/src/ble_hs.c b/nimble/host/src/ble_hs.c
index 41bf5e2c3a..61fc60dcfc 100644
--- a/nimble/host/src/ble_hs.c
+++ b/nimble/host/src/ble_hs.c
@@ -558,6 +558,7 @@ ble_hs_enqueue_hci_event(uint8_t *hci_evt)
     if (ev == NULL) {
         ble_transport_free(hci_evt);
     } else {
+        memset(ev, 0, sizeof *ev);
         ble_npl_event_init(ev, ble_hs_event_rx_hci_ev, hci_evt);
         ble_npl_eventq_put(ble_hs_evq, ev);
     }
diff --git a/nimble/transport/cdc/src/cdc_hci.c b/nimble/transport/cdc/src/cdc_hci.c
index 08c8f984a0..b2d5a5fdb8 100644
--- a/nimble/transport/cdc/src/cdc_hci.c
+++ b/nimble/transport/cdc/src/cdc_hci.c
@@ -178,6 +178,7 @@ cdc_hci_get_usb_in_packet(void)
 {
     struct usb_in_packet *packet = (struct usb_in_packet *)os_memblock_get(&usb_in_packet_pool);
     if (packet) {
+        memset(packet, 0, sizeof *packet);
         packet->data = NULL;
     }
     return packet;
diff --git a/nimble/transport/emspi/src/ble_hci_emspi.c b/nimble/transport/emspi/src/ble_hci_emspi.c
index d07820f7bb..6efb1812e9 100644
--- a/nimble/transport/emspi/src/ble_hci_emspi.c
+++ b/nimble/transport/emspi/src/ble_hci_emspi.c
@@ -256,6 +256,7 @@ ble_hci_emspi_acl_tx(struct os_mbuf *om)
         return BLE_ERR_MEM_CAPACITY;
     }
 
+    memset(pkt, 0, sizeof *pkt);
     pkt->type = BLE_HCI_EMSPI_PKT_ACL;
     pkt->data = om;
 
@@ -284,6 +285,7 @@ ble_hci_emspi_cmdevt_tx(uint8_t *cmd_buf, uint8_t pkt_type)
         return BLE_ERR_MEM_CAPACITY;
     }
 
+    memset(pkt, 0, sizeof *pkt);
     pkt->type = pkt_type;
     pkt->data = cmd_buf;
 
@@ -695,4 +697,4 @@ int
 ble_transport_to_ll_acl_impl(struct os_mbuf *om)
 {
     return ble_hci_emspi_acl_tx(om);
-}
\ No newline at end of file
+}
diff --git a/nimble/transport/uart/src/hci_uart.c b/nimble/transport/uart/src/hci_uart.c
index af1f45ae92..c54b6322d4 100644
--- a/nimble/transport/uart/src/hci_uart.c
+++ b/nimble/transport/uart/src/hci_uart.c
@@ -185,6 +185,7 @@ ble_transport_to_hs_evt_impl(void *buf)
         return -ENOMEM;
     }
 
+    memset(txe, 0, sizeof *txe);
     txe->type = HCI_H4_EVT;
     txe->sent_type = 0;
     txe->len = 2 + ((uint8_t *)buf)[1];
@@ -213,6 +214,7 @@ ble_transport_to_hs_acl_impl(struct os_mbuf *om)
         return -ENOMEM;
     }
 
+    memset(txe, 0, sizeof *txe);
     txe->type = HCI_H4_ACL;
     txe->sent_type = 0;
     txe->len = OS_MBUF_PKTLEN(om);
@@ -241,6 +243,7 @@ ble_transport_to_hs_iso_impl(struct os_mbuf *om)
         return -ENOMEM;
     }
 
+    memset(txe, 0, sizeof *txe);
     txe->type = HCI_H4_ISO;
     txe->sent_type = 0;
     txe->len = OS_MBUF_PKTLEN(om);
diff --git a/nimble/transport/uart_ll/src/hci_uart.c b/nimble/transport/uart_ll/src/hci_uart.c
index 95eae3f4b3..2e4b26b110 100644
--- a/nimble/transport/uart_ll/src/hci_uart.c
+++ b/nimble/transport/uart_ll/src/hci_uart.c
@@ -181,6 +181,7 @@ ble_transport_to_ll_cmd_impl(void *buf)
         return -ENOMEM;
     }
 
+    memset(txe, 0, sizeof *txe);
     txe->type = HCI_H4_CMD;
     txe->sent_type = 0;
     txe->len = 3 + ((uint8_t *)buf)[2];
@@ -209,6 +210,7 @@ ble_transport_to_ll_acl_impl(struct os_mbuf *om)
         return -ENOMEM;
     }
 
+    memset(txe, 0, sizeof *txe);
     txe->type = HCI_H4_ACL;
     txe->sent_type = 0;
     txe->len = OS_MBUF_PKTLEN(om);
diff --git a/nimble/transport/usb/src/ble_hci_usb.c b/nimble/transport/usb/src/ble_hci_usb.c
index 01c60b88d9..c237eceeb3 100644
--- a/nimble/transport/usb/src/ble_hci_usb.c
+++ b/nimble/transport/usb/src/ble_hci_usb.c
@@ -196,6 +196,7 @@ ble_hci_trans_ll_tx(struct tx_queue *queue, struct os_mbuf *om)
         return BLE_ERR_MEM_CAPACITY;
     }
 
+    memset(pkt, 0, sizeof *pkt);
     pkt->data = om;
     OS_ENTER_CRITICAL(sr);
     first = STAILQ_EMPTY(&queue->queue);
@@ -229,6 +230,7 @@ ble_hci_trans_ll_evt_tx(void *buf)
         return BLE_ERR_MEM_CAPACITY;
     }
 
+    memset(pkt, 0, sizeof *pkt);
     pkt->data = hci_ev;
     OS_ENTER_CRITICAL(sr);
     first = STAILQ_EMPTY(&ble_hci_tx_evt_queue.queue);