diff --git a/components/bt/controller/esp32c5/Kconfig.in b/components/bt/controller/esp32c5/Kconfig.in
index 2e6db9fdf6..2982b6da8e 100644
--- a/components/bt/controller/esp32c5/Kconfig.in
+++ b/components/bt/controller/esp32c5/Kconfig.in
@@ -812,3 +812,34 @@ config BT_LE_CTRL_FAST_CONN_DATA_TX_EN
     help
         If this option is enabled, The Controller will continue to
         Send an empty PDU after sending valid connection data within an interval.
+
+menu "Reserved Memory Config"
+    config BT_LE_EXT_ADV_RESERVED_MEMORY_COUNT
+        int "The value of reserved EXT ADV memory count at initialization"
+        range 0 4
+        default 2
+        help
+            This value sets the number the Controller will allocate for extended advertisement
+            instances at initialization process. If more extended advertisement instances are
+            enabled, those memory will be dynamically allocated.
+            Using reduced amount of reserved memory will save heap size at the cost of extra
+            time consumption at advertising start process and possible advertising start failure
+            due to memory shortage.
+            The actual reserved memory count will be the minimum value between the maximum
+            extended advertisement instances and the BT_LE_EXT_ADV_RESERVED_MEMORY_COUNT.
+
+
+    config BT_LE_CONN_RESERVED_MEMORY_COUNT
+        int "The value of reserved CONN memory count at initialization"
+        range 0 70
+        default 2
+        help
+            This value sets the number the Controller will allocate for connection instances
+            at the initialization process. If more connection instances are enabled, those
+            memory will be dynamically allocated.
+            Using reduced amount of reserved memory will save heap size at the cost of extra
+            time consumption at connection establishment process and possible connection
+            establishment failure due to memory shortage.
+            The actual reserved memory count will be the minimum value between the maximum
+            connection instances and the BT_LE_CONN_RESERVED_MEMORY_COUNT.
+endmenu
diff --git a/components/bt/controller/esp32c5/esp_bt_cfg.h b/components/bt/controller/esp32c5/esp_bt_cfg.h
index 48a845a3fa..01f9dc6182 100644
--- a/components/bt/controller/esp32c5/esp_bt_cfg.h
+++ b/components/bt/controller/esp32c5/esp_bt_cfg.h
@@ -280,6 +280,9 @@ extern "C" {
 
 #define BLE_LL_TX_PWR_DBM_N                 (CONFIG_BT_LE_DFT_TX_POWER_LEVEL_DBM_EFF)
 
+#define BLE_LL_ADV_SM_RESERVE_CNT_N         MIN(DEFAULT_BT_LE_MAX_EXT_ADV_INSTANCES, CONFIG_BT_LE_EXT_ADV_RESERVED_MEMORY_COUNT)
+#define BLE_LL_CONN_SM_RESERVE_CNT_N        MIN(DEFAULT_BT_LE_MAX_CONNECTIONS, CONFIG_BT_LE_CONN_RESERVED_MEMORY_COUNT)
+
 #define RUN_BQB_TEST                        (0)
 #define RUN_QA_TEST                         (0)
 #define NIMBLE_DISABLE_SCAN_BACKOFF         (0)
diff --git a/components/bt/include/esp32c5/include/esp_bt.h b/components/bt/include/esp32c5/include/esp_bt.h
index 91b1da306a..ce490db77a 100644
--- a/components/bt/include/esp32c5/include/esp_bt.h
+++ b/components/bt/include/esp32c5/include/esp_bt.h
@@ -159,7 +159,7 @@ esp_err_t esp_ble_tx_power_set_enhanced(esp_ble_enhanced_power_type_t power_type
  */
 esp_power_level_t esp_ble_tx_power_get_enhanced(esp_ble_enhanced_power_type_t power_type, uint16_t handle);
 
-#define CONFIG_VERSION  0x20250526
+#define CONFIG_VERSION  0x20250606
 #define CONFIG_MAGIC    0x5A5AA5A5
 
 /**
@@ -232,6 +232,8 @@ typedef struct {
                                                         - 0 - Disable
                                                         - 1 - Enable (default) */
     int8_t ch39_txpwr;                              /*!< BLE transmit power (in dBm) used for BLE advertising on channel 39. */
+    uint8_t adv_rsv_cnt;                             /*!< BLE adv state machine reserve count number */
+    uint8_t conn_rsv_cnt;                            /*!< BLE conn state machine reserve count number */
     uint32_t config_magic;                           /*!< Magic number for configuration validation */
 } esp_bt_controller_config_t;
 
@@ -291,6 +293,8 @@ typedef struct {
     .skip_unnecessary_checks_en = 0,                                                    \
     .fast_conn_data_tx_en       = DEFAULT_BT_LE_CTRL_FAST_CONN_DATA_TX_EN,              \
     .ch39_txpwr                 = BLE_LL_TX_PWR_DBM_N,                                  \
+    .adv_rsv_cnt                = BLE_LL_ADV_SM_RESERVE_CNT_N,                          \
+    .conn_rsv_cnt               = BLE_LL_CONN_SM_RESERVE_CNT_N,                         \
     .config_magic = CONFIG_MAGIC,                                                       \
 }