diff --git a/components/openthread/src/esp_openthread.cpp b/components/openthread/src/esp_openthread.cpp
index b667e9bcad..311617f6a0 100644
--- a/components/openthread/src/esp_openthread.cpp
+++ b/components/openthread/src/esp_openthread.cpp
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -80,19 +80,20 @@ esp_err_t esp_openthread_init(const esp_openthread_platform_config_t *config)
     ESP_RETURN_ON_ERROR(esp_openthread_platform_init(config), OT_PLAT_LOG_TAG,
                         "Failed to initialize OpenThread platform driver");
     esp_openthread_lock_acquire(portMAX_DELAY);
-    ESP_RETURN_ON_FALSE(otInstanceInitSingle() != NULL, ESP_FAIL, OT_PLAT_LOG_TAG,
-                        "Failed to initialize OpenThread instance");
+    esp_err_t ret = ESP_OK;
+    ESP_GOTO_ON_FALSE(otInstanceInitSingle() != NULL, ESP_FAIL, exit, OT_PLAT_LOG_TAG,
+                      "Failed to initialize OpenThread instance");
 #if CONFIG_OPENTHREAD_DNS64_CLIENT
-    ESP_RETURN_ON_ERROR(esp_openthread_dns64_client_init(), OT_PLAT_LOG_TAG,
-                        "Failed to initialize OpenThread dns64 client");
+    ESP_GOTO_ON_ERROR(esp_openthread_dns64_client_init(), exit, OT_PLAT_LOG_TAG,
+                      "Failed to initialize OpenThread dns64 client");
 #endif
 #if !CONFIG_OPENTHREAD_RADIO
-    ESP_RETURN_ON_ERROR(esp_openthread_state_event_init(esp_openthread_get_instance()), OT_PLAT_LOG_TAG,
-                        "Failed to initialize OpenThread state event");
+    ESP_GOTO_ON_ERROR(esp_openthread_state_event_init(esp_openthread_get_instance()), exit, OT_PLAT_LOG_TAG,
+                      "Failed to initialize OpenThread state event");
 #endif
+exit:
     esp_openthread_lock_release();
-
-    return ESP_OK;
+    return ret;
 }
 
 esp_err_t esp_openthread_auto_start(otOperationalDatasetTlvs *datasetTlvs)
@@ -140,7 +141,7 @@ esp_err_t esp_openthread_auto_start(otOperationalDatasetTlvs *datasetTlvs)
             memcpy(dataset.mMeshLocalPrefix.m8, prefix.mPrefix.mFields.m8, sizeof(dataset.mMeshLocalPrefix.m8));
             dataset.mComponents.mIsMeshLocalPrefixPresent = true;
         } else {
-            ESP_LOGE("Failed to parse mesh local prefix", CONFIG_OPENTHREAD_MESH_LOCAL_PREFIX);
+            ESP_LOGE(OT_PLAT_LOG_TAG, "Failed to parse mesh local prefix: %s", CONFIG_OPENTHREAD_MESH_LOCAL_PREFIX);
         }
 
         // Network Key
diff --git a/components/openthread/src/esp_openthread_cli.c b/components/openthread/src/esp_openthread_cli.c
index 28125ba893..83bda1d2ca 100644
--- a/components/openthread/src/esp_openthread_cli.c
+++ b/components/openthread/src/esp_openthread_cli.c
@@ -64,8 +64,12 @@ static int cli_output_callback(void *context, const char *format, va_list args)
 {
     char prompt_check[3];
     int ret = 0;
+    va_list args_copy;
+
+    va_copy(args_copy, args);
+    vsnprintf(prompt_check, sizeof(prompt_check), format, args_copy);
+    va_end(args_copy);
 
-    vsnprintf(prompt_check, sizeof(prompt_check), format, args);
     if (!strncmp(prompt_check, "> ", sizeof(prompt_check)) && s_cli_task) {
         xTaskNotifyGive(s_cli_task);
     } else {
@@ -93,7 +97,11 @@ esp_err_t esp_openthread_cli_input(const char *line)
 
     ESP_RETURN_ON_FALSE(line_copy != NULL, ESP_ERR_NO_MEM, OT_PLAT_LOG_TAG, "Failed to copy OpenThread CLI line input");
 
-    return esp_openthread_task_queue_post(line_handle_task, line_copy);
+    esp_err_t ret = esp_openthread_task_queue_post(line_handle_task, line_copy);
+    if (ret != ESP_OK) {
+        free(line_copy);
+    }
+    return ret;
 }
 
 static int ot_cli_console_callback(int argc, char **argv)
@@ -140,6 +148,11 @@ static void ot_cli_loop(void *context)
 
     console_config.hint_color = -1;
     ret = esp_console_init(&console_config);
+    if (ret != ESP_OK) {
+        ESP_LOGE(OT_PLAT_LOG_TAG, "Failed to initialize console: %s", esp_err_to_name(ret));
+        vTaskDelete(NULL);
+        return;
+    }
 
     linenoiseSetMultiLine(true);
     linenoiseHistorySetMaxLen(100);
@@ -183,9 +196,8 @@ static void ot_cli_loop(void *context)
     }
 }
 
-void esp_openthread_cli_create_task()
+void esp_openthread_cli_create_task(void)
 {
-    xTaskCreate(ot_cli_loop, "ot_cli", 4096, xTaskGetCurrentTaskHandle(), 4, &s_cli_task);
-
-    return;
+    BaseType_t ret = xTaskCreate(ot_cli_loop, "ot_cli", 4096, xTaskGetCurrentTaskHandle(), 4, &s_cli_task);
+    ESP_RETURN_ON_FALSE(ret == pdPASS, , OT_PLAT_LOG_TAG, "Failed to create OpenThread CLI task");
 }
diff --git a/components/openthread/src/esp_openthread_dns64.c b/components/openthread/src/esp_openthread_dns64.c
index 442ec4308f..2659b1a451 100644
--- a/components/openthread/src/esp_openthread_dns64.c
+++ b/components/openthread/src/esp_openthread_dns64.c
@@ -107,6 +107,7 @@ static void dns_found_handler(const char *name, const ip_addr_t *ipaddr, void *c
     if (resolve_entry && resolve_entry->found) {
         if (!ipaddr) {
             resolve_entry->found(name, NULL, resolve_entry->callback_arg);
+            resolve_entry->is_using = false;
         } else if (lwip_strnicmp(name, resolve_entry->name, sizeof(resolve_entry->name)) == 0) {
             ip_addr_t ipaddr_copy = *ipaddr;
             ip6_addr_t nat64_prefix;
@@ -117,8 +118,8 @@ static void dns_found_handler(const char *name, const ip_addr_t *ipaddr, void *c
                 ipaddr_copy.u_addr.ip6.zone = IP6_NO_ZONE;
             }
             resolve_entry->found(name, &ipaddr_copy, resolve_entry->callback_arg);
+            resolve_entry->is_using = false;
         }
-        resolve_entry->is_using = false;
     }
 }
 
diff --git a/components/openthread/src/esp_openthread_lock.c b/components/openthread/src/esp_openthread_lock.c
index 7e35da6c21..322c00c1f7 100644
--- a/components/openthread/src/esp_openthread_lock.c
+++ b/components/openthread/src/esp_openthread_lock.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -20,9 +20,14 @@ bool esp_openthread_lock_acquire(TickType_t block_ticks)
 {
     ESP_RETURN_ON_FALSE(s_openthread_mutex && s_openthread_task_mutex, false, OT_PLAT_LOG_TAG,
             "Failed to acquire the lock because the mutex is not ready");
-    BaseType_t ret = xSemaphoreTakeRecursive(s_openthread_mutex, block_ticks) &&
-        xSemaphoreTakeRecursive(s_openthread_task_mutex, block_ticks);
-    return (ret == pdTRUE);
+    if (xSemaphoreTakeRecursive(s_openthread_mutex, block_ticks) != pdTRUE) {
+        return false;
+    }
+    if (xSemaphoreTakeRecursive(s_openthread_task_mutex, block_ticks) != pdTRUE) {
+        xSemaphoreGiveRecursive(s_openthread_mutex);
+        return false;
+    }
+    return true;
 }
 
 void esp_openthread_lock_release(void)
@@ -61,6 +66,7 @@ esp_err_t esp_openthread_lock_init(void)
     s_openthread_mutex = xSemaphoreCreateRecursiveMutex();
     s_openthread_task_mutex = xSemaphoreCreateRecursiveMutex();
     if (s_openthread_mutex == NULL || s_openthread_task_mutex == NULL) {
+        esp_openthread_lock_deinit();
         return ESP_ERR_NO_MEM;
     }
     return ESP_OK;
diff --git a/components/openthread/src/esp_openthread_netif_glue.c b/components/openthread/src/esp_openthread_netif_glue.c
index c49a260407..35dd8db149 100644
--- a/components/openthread/src/esp_openthread_netif_glue.c
+++ b/components/openthread/src/esp_openthread_netif_glue.c
@@ -243,10 +243,8 @@ void esp_openthread_register_meshcop_e_handler(esp_event_handler_t handler, bool
 {
     if (for_publish) {
         meshcop_e_publish_handler = handler;
-    } else if (!for_publish) {
-        meshcop_e_remove_handler = handler;
     } else {
-        ESP_ERROR_CHECK(ESP_FAIL);
+        meshcop_e_remove_handler = handler;
     }
 }
 
@@ -345,6 +343,8 @@ void *esp_openthread_netif_glue_init(const esp_openthread_platform_config_t *con
     s_openthread_netif_glue.event_fd = eventfd(0, 0);
     if (s_openthread_netif_glue.event_fd < 0) {
         ESP_LOGE(OT_PLAT_LOG_TAG, "Failed to create event fd for Thread netif");
+        vQueueDelete(s_packet_queue);
+        s_packet_queue = NULL;
         ExitNow(error = ESP_FAIL);
     }
     s_openthread_netif_glue.base.post_attach = openthread_netif_post_attach;
diff --git a/components/openthread/src/esp_openthread_task_queue.c b/components/openthread/src/esp_openthread_task_queue.c
index 9d9bf87e6f..d656b77dde 100644
--- a/components/openthread/src/esp_openthread_task_queue.c
+++ b/components/openthread/src/esp_openthread_task_queue.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -34,8 +34,12 @@ esp_err_t esp_openthread_task_queue_init(const esp_openthread_platform_config_t
     ESP_RETURN_ON_FALSE(s_task_queue_event_fd >= 0, ESP_FAIL, OT_PLAT_LOG_TAG,
                         "Failed to create OpenThread task queue event fd");
     s_task_queue = xQueueCreate(config->port_config.task_queue_size, sizeof(task_storage_t));
-    ESP_RETURN_ON_FALSE(s_task_queue != NULL, ESP_ERR_NO_MEM, OT_PLAT_LOG_TAG,
-                        "Failed to create OpenThread task queue");
+    if (s_task_queue == NULL) {
+        close(s_task_queue_event_fd);
+        s_task_queue_event_fd = -1;
+        ESP_LOGE(OT_PLAT_LOG_TAG, "Failed to create OpenThread task queue");
+        return ESP_ERR_NO_MEM;
+    }
     return esp_openthread_platform_workflow_register(&esp_openthread_task_queue_update,
                                                      &esp_openthread_task_queue_process, task_queue_workflow);
 }
diff --git a/components/openthread/src/port/esp_openthread_messagepool.c b/components/openthread/src/port/esp_openthread_messagepool.c
index 7996af3340..3704603349 100644
--- a/components/openthread/src/port/esp_openthread_messagepool.c
+++ b/components/openthread/src/port/esp_openthread_messagepool.c
@@ -18,11 +18,14 @@
 #define OT_MSGPOOL_NUM_BUFFERS_NO_PSRAM 65
 
 static int s_buffer_pool_head = -1;
+static uint16_t s_buffer_pool_size = 0;
 static otMessageBuffer **s_buffer_pool_pointer = NULL;
 static otMessageBuffer *s_buffer_pool = NULL;
 
 void otPlatMessagePoolInit(otInstance *aInstance, uint16_t aMinNumFreeBuffers, size_t aBufferSize)
 {
+    assert(aBufferSize % sizeof(otMessageBuffer) == 0);
+
     uint16_t num_buffers = aMinNumFreeBuffers;
 
     if (!esp_psram_is_initialized() && num_buffers > OT_MSGPOOL_NUM_BUFFERS_NO_PSRAM) {
@@ -41,6 +44,7 @@ void otPlatMessagePoolInit(otInstance *aInstance, uint16_t aMinNumFreeBuffers, s
         s_buffer_pool_pointer[i] = buffer_pool + i * aBufferSize / sizeof(otMessageBuffer);
     }
     s_buffer_pool_head = num_buffers - 1;
+    s_buffer_pool_size = num_buffers;
     s_buffer_pool = buffer_pool;
     ESP_LOGI(OT_PLAT_LOG_TAG, "Create message buffer pool successfully, size %d", num_buffers * aBufferSize);
 }
@@ -57,6 +61,7 @@ otMessageBuffer *otPlatMessagePoolNew(otInstance *aInstance)
 
 void otPlatMessagePoolFree(otInstance *aInstance, otMessageBuffer *aBuffer)
 {
+    assert(s_buffer_pool_head + 1 < s_buffer_pool_size);
     s_buffer_pool_head++;
     s_buffer_pool_pointer[s_buffer_pool_head] = aBuffer;
 }
@@ -77,4 +82,5 @@ void otPlatMessagePoolDeinit(otInstance *aInstance)
         s_buffer_pool = NULL;
     }
     s_buffer_pool_head = -1;
+    s_buffer_pool_size = 0;
 }
diff --git a/components/openthread/src/port/esp_openthread_radio.c b/components/openthread/src/port/esp_openthread_radio.c
index c4e4cf654c..326175ec6d 100644
--- a/components/openthread/src/port/esp_openthread_radio.c
+++ b/components/openthread/src/port/esp_openthread_radio.c
@@ -81,7 +81,7 @@ static uint32_t s_csl_sample_time;
 #if OPENTHREAD_CONFIG_THREAD_VERSION >= OT_THREAD_VERSION_1_2
 static uint32_t s_mac_frame_counter;
 static uint8_t s_key_id;
-static struct otMacKeyMaterial s_pervious_key;
+static struct otMacKeyMaterial s_previous_key;
 static struct otMacKeyMaterial s_current_key;
 static struct otMacKeyMaterial s_next_key;
 #if OPENTHREAD_CONFIG_PLATFORM_KEY_REFERENCES_ENABLE
@@ -101,7 +101,7 @@ static void ot_set_security_key_from_key_material(struct otMacKeyMaterial a_key_
     /* Key bytes are pre-exported in task context (otPlatRadioSetMacKey).
      * Identify which cached buffer to use by comparing the key reference.
      * Jira TZ-2472 */
-    if (a_key_material.mKeyMaterial.mKeyRef == s_pervious_key.mKeyMaterial.mKeyRef) {
+    if (a_key_material.mKeyMaterial.mKeyRef == s_previous_key.mKeyMaterial.mKeyRef) {
         memcpy(s_security_key, s_pervious_key_bytes, 16);
     } else if (a_key_material.mKeyMaterial.mKeyRef == s_next_key.mKeyMaterial.mKeyRef) {
         memcpy(s_security_key, s_next_key_bytes, 16);
@@ -165,7 +165,7 @@ esp_err_t esp_openthread_radio_init(const esp_openthread_platform_config_t *conf
 
 void esp_openthread_radio_deinit(void)
 {
-    if (s_radio_event_fd > 0) {
+    if (s_radio_event_fd != -1) {
         close(s_radio_event_fd);
         s_radio_event_fd = -1;
     }
@@ -521,7 +521,7 @@ void otPlatRadioSetMacKey(otInstance *aInstance, uint8_t aKeyIdMode, uint8_t aKe
     assert(aPrevKey != NULL && aCurrKey != NULL && aNextKey != NULL);
 
     s_key_id = aKeyId;
-    s_pervious_key = *aPrevKey;
+    s_previous_key = *aPrevKey;
     s_current_key  = *aCurrKey;
     s_next_key     = *aNextKey;
 #if OPENTHREAD_CONFIG_PLATFORM_KEY_REFERENCES_ENABLE
@@ -656,7 +656,7 @@ static esp_err_t IRAM_ATTR enh_ack_set_security_addr_and_key(otRadioFrame *ack_f
     if (key_id == s_key_id) {
         key = &s_current_key;
     } else if (key_id == s_key_id - 1) {
-        key = &s_pervious_key;
+        key = &s_previous_key;
     } else if (key_id == s_key_id + 1) {
         key = &s_next_key;
     } else {
@@ -729,6 +729,7 @@ void IRAM_ATTR esp_ieee802154_receive_done(uint8_t *data, esp_ieee802154_frame_i
 
     if (atomic_load(&s_recv_queue.used) == CONFIG_IEEE802154_RX_BUFFER_SIZE) {
         ESP_EARLY_LOGE(OT_PLAT_LOG_TAG, "radio receive buffer full!");
+        esp_ieee802154_receive_handle_done(data);
         return;
     }
 
diff --git a/components/openthread/src/port/esp_openthread_radio_spinel.cpp b/components/openthread/src/port/esp_openthread_radio_spinel.cpp
index b7892da9af..f9695b2387 100644
--- a/components/openthread/src/port/esp_openthread_radio_spinel.cpp
+++ b/components/openthread/src/port/esp_openthread_radio_spinel.cpp
@@ -414,7 +414,11 @@ otError otPlatDiagProcess(otInstance *aInstance, uint8_t aArgsLength, char *aArg
     char *end = cmd + sizeof(cmd);
 
     for (int index = 0; index < aArgsLength; index++) {
-        cur += snprintf(cur, static_cast<size_t>(end - cur), "%s ", aArgs[index]);
+        if (end > cur + strlen(aArgs[index])) {
+            cur += snprintf(cur, static_cast<size_t>(end - cur), "%s ", aArgs[index]);
+        } else {
+            return OT_ERROR_INVALID_ARGS;
+        }
     }
 
     return s_radio.PlatDiagProcess(cmd);
diff --git a/components/openthread/src/port/esp_openthread_settings.c b/components/openthread/src/port/esp_openthread_settings.c
index e2cc930d26..c9f62f25ae 100644
--- a/components/openthread/src/port/esp_openthread_settings.c
+++ b/components/openthread/src/port/esp_openthread_settings.c
@@ -223,4 +223,5 @@ otError otPlatSettingsDelete(otInstance *aInstance, uint16_t aKey, int aIndex)
 void otPlatSettingsWipe(otInstance *aInstance)
 {
     nvs_erase_all(s_ot_nvs_handle);
+    nvs_commit(s_ot_nvs_handle);
 }
diff --git a/components/openthread/src/port/esp_openthread_sleep.c b/components/openthread/src/port/esp_openthread_sleep.c
index 8ca7504a6f..8570ed5aa6 100644
--- a/components/openthread/src/port/esp_openthread_sleep.c
+++ b/components/openthread/src/port/esp_openthread_sleep.c
@@ -36,6 +36,7 @@ esp_err_t esp_openthread_sleep_init(void)
 
 void esp_openthread_sleep_process(void)
 {
+    assert(s_pm_lock != NULL);
     if (s_ot_sleep == false && esp_ieee802154_get_state() == ESP_IEEE802154_RADIO_SLEEP) {
         esp_pm_lock_release(s_pm_lock);
         s_ot_sleep = true;
diff --git a/components/openthread/src/port/esp_openthread_spi_slave.c b/components/openthread/src/port/esp_openthread_spi_slave.c
index 754300e5c9..1a47a00451 100644
--- a/components/openthread/src/port/esp_openthread_spi_slave.c
+++ b/components/openthread/src/port/esp_openthread_spi_slave.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2022-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -67,21 +67,22 @@ static void IRAM_ATTR handle_spi_transaction_done(spi_slave_transaction_t *trans
                             trans->rx_buffer, pending_transaction->input_buf_len, trans->trans_len)) {
         esp_openthread_task_queue_post(s_process_callback, s_context);
     }
-    trans = NULL;
 }
 
 esp_err_t esp_openthread_host_rcp_spi_init(const esp_openthread_platform_config_t *config)
 {
+    esp_err_t ret = ESP_OK;
+
     s_spi_config = heap_caps_malloc(sizeof(esp_openthread_spi_slave_config_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
-    ESP_RETURN_ON_FALSE(s_spi_config != NULL, ESP_ERR_NO_MEM, OT_PLAT_LOG_TAG,
-                        "failed to allocate memory for SPI transaction on internal heap");
+    ESP_GOTO_ON_FALSE(s_spi_config != NULL, ESP_ERR_NO_MEM, err, OT_PLAT_LOG_TAG,
+                      "failed to allocate memory for SPI transaction on internal heap");
     memcpy(s_spi_config, &(config->host_config.spi_slave_config), sizeof(esp_openthread_spi_slave_config_t));
     gpio_config_t io_conf = {
         .intr_type = GPIO_INTR_DISABLE,
         .mode = GPIO_MODE_OUTPUT,
-        .pin_bit_mask = (1 << s_spi_config->intr_pin),
+        .pin_bit_mask = (1ULL << s_spi_config->intr_pin),
     };
-    ESP_RETURN_ON_ERROR(gpio_config(&io_conf), OT_PLAT_LOG_TAG, "fail to configure SPI gpio");
+    ESP_GOTO_ON_ERROR(gpio_config(&io_conf), err, OT_PLAT_LOG_TAG, "fail to configure SPI gpio");
 
     gpio_set_pull_mode(s_spi_config->bus_config.mosi_io_num, GPIO_PULLUP_ONLY);
     gpio_set_pull_mode(s_spi_config->bus_config.sclk_io_num, GPIO_PULLUP_ONLY);
@@ -90,11 +91,9 @@ esp_err_t esp_openthread_host_rcp_spi_init(const esp_openthread_platform_config_
     s_spi_transaction = heap_caps_malloc(sizeof(spi_slave_transaction_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
     s_pending_transaction = heap_caps_malloc(sizeof(pending_transaction_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
     if (s_spi_transaction == NULL || s_pending_transaction == NULL) {
-        heap_caps_free(s_spi_config);
-        heap_caps_free(s_spi_transaction);
-        heap_caps_free(s_pending_transaction);
         ESP_LOGE(OT_PLAT_LOG_TAG, "failed to allocate memory for SPI transaction on internal heap");
-        return ESP_ERR_NO_MEM;
+        ret = ESP_ERR_NO_MEM;
+        goto err;
     }
 
     s_spi_transaction->user = (void *)s_pending_transaction;
@@ -102,11 +101,20 @@ esp_err_t esp_openthread_host_rcp_spi_init(const esp_openthread_platform_config_
     /* Initialize SPI slave interface */
     s_spi_config->slave_config.post_setup_cb = handle_spi_setup_done;
     s_spi_config->slave_config.post_trans_cb = handle_spi_transaction_done;
-    ESP_RETURN_ON_ERROR(spi_slave_initialize(s_spi_config->host_device, &s_spi_config->bus_config,
-                                             &s_spi_config->slave_config, SPI_DMA_CH_AUTO),
-                        OT_PLAT_LOG_TAG, "fail to initialize SPI slave");
+    ESP_GOTO_ON_ERROR(spi_slave_initialize(s_spi_config->host_device, &s_spi_config->bus_config,
+                                           &s_spi_config->slave_config, SPI_DMA_CH_AUTO),
+                      err, OT_PLAT_LOG_TAG, "fail to initialize SPI slave");
 
     return ESP_OK;
+
+err:
+    heap_caps_free(s_spi_config);
+    s_spi_config = NULL;
+    heap_caps_free(s_spi_transaction);
+    s_spi_transaction = NULL;
+    heap_caps_free(s_pending_transaction);
+    s_pending_transaction = NULL;
+    return ret;
 }
 
 void esp_openthread_spi_slave_deinit(void)
diff --git a/components/openthread/src/port/esp_openthread_trel.c b/components/openthread/src/port/esp_openthread_trel.c
index 8eca69ce4e..9b50504385 100644
--- a/components/openthread/src/port/esp_openthread_trel.c
+++ b/components/openthread/src/port/esp_openthread_trel.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2024-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2024-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -191,6 +191,8 @@ esp_err_t esp_openthread_trel_process(otInstance *aInstance, const esp_openthrea
             }
             if (should_handle) {
                 otPlatTrelHandleReceived(aInstance, data_buf, length, source_addr);
+                s_trel_counters.mRxPackets++;
+                s_trel_counters.mRxBytes += length;
             }
             pbuf_free(recv_buf);
             free(data_buf_to_free);
@@ -255,7 +257,13 @@ void otPlatTrelSend(otInstance       *aInstance,
     esp_openthread_task_switching_lock_release();
     err = esp_netif_tcpip_exec(trel_send_task, &task);
     esp_openthread_task_switching_lock_acquire(portMAX_DELAY);
-    ESP_RETURN_ON_FALSE(err == ESP_OK, , OT_PLAT_LOG_TAG, "Failed to send TREL message");
+    if (err == ESP_OK) {
+        s_trel_counters.mTxPackets++;
+        s_trel_counters.mTxBytes += aUdpPayloadLen;
+    } else {
+        s_trel_counters.mTxFailure++;
+        ESP_LOGW(OT_PLAT_LOG_TAG, "Failed to send TREL message");
+    }
 }
 
 void otPlatTrelNotifyPeerSocketAddressDifference(otInstance       *aInstance,
@@ -284,8 +292,10 @@ void otPlatTrelRegisterService(otInstance *aInstance, uint16_t aPort, const uint
     s_is_service_registered = true;
     uint16_t index = 0;
     while (index < aTxtLength) {
-        const uint8_t *item_header = aTxtData + index + 1;
         uint8_t item_len = aTxtData[index];
+        ESP_GOTO_ON_FALSE(index + 1 + item_len <= aTxtLength, ESP_FAIL, exit, OT_PLAT_LOG_TAG,
+                          "Malformed _trel._udp TXT record: item exceeds data length");
+        const uint8_t *item_header = aTxtData + index + 1;
 
         char key[UINT8_MAX + 1];
         for (uint16_t i = 0; i < item_len; i++) {
@@ -348,6 +358,7 @@ void otPlatTrelDisable(otInstance *aInstance)
     free_all_buffer();
     close(s_trel_event_fd);
     s_trel_event_fd = -1;
+    s_trel_netif = NULL;
 }
 
 const otPlatTrelCounters *otPlatTrelGetCounters(otInstance *aInstance)
diff --git a/components/openthread/src/port/esp_openthread_uart.c b/components/openthread/src/port/esp_openthread_uart.c
index 1e19af66e5..685e2ee558 100644
--- a/components/openthread/src/port/esp_openthread_uart.c
+++ b/components/openthread/src/port/esp_openthread_uart.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -30,7 +30,8 @@
 #endif
 
 static int s_uart_port;
-static int s_uart_fd;
+static int s_uart_fd = -1;
+static bool s_uart_driver_installed = false;
 static uint8_t s_uart_buffer[ESP_OPENTHREAD_UART_BUFFER_SIZE];
 static const char *uart_workflow = "uart";
 
@@ -89,6 +90,7 @@ esp_err_t esp_openthread_uart_init_port(const esp_openthread_uart_config_t *conf
         OT_PLAT_LOG_TAG, "uart_set_pin failed");
     ESP_RETURN_ON_ERROR(uart_driver_install(config->port, ESP_OPENTHREAD_UART_BUFFER_SIZE, 0, 0, NULL, 0),
                         OT_PLAT_LOG_TAG, "uart_driver_install failed");
+    s_uart_driver_installed = true;
     uart_vfs_dev_use_driver(config->port);
     return ESP_OK;
 }
@@ -173,7 +175,10 @@ void esp_openthread_uart_deinit()
         close(s_uart_fd);
         s_uart_fd = -1;
     }
-    uart_driver_delete(s_uart_port);
+    if (s_uart_driver_installed) {
+        uart_driver_delete(s_uart_port);
+        s_uart_driver_installed = false;
+    }
     esp_openthread_platform_workflow_unregister(uart_workflow);
 }
 
diff --git a/components/openthread/src/port/esp_openthread_udp.c b/components/openthread/src/port/esp_openthread_udp.c
index 614bac12b2..b298ce3121 100644
--- a/components/openthread/src/port/esp_openthread_udp.c
+++ b/components/openthread/src/port/esp_openthread_udp.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2021-2026 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -135,8 +135,12 @@ static void udp_recv_task(void *ctx)
                  ESP_LOGE(OT_PLAT_LOG_TAG, "Failed to copy OpenThread message when receiving OpenThread plat UDP"));
     task->socket->mHandler(task->socket->mContext, message, &message_info);
     otMessageFree(message);
+    message = NULL;
 
 exit:
+    if (message != NULL) {
+        otMessageFree(message);
+    }
     free(task);
     if (data_buf_to_free) {
         free(data_buf_to_free);
@@ -156,6 +160,8 @@ static void handle_udp_recv(void *ctx, struct udp_pcb *pcb, struct pbuf *p, cons
 
     if (task == NULL) {
         ESP_LOGE(OT_PLAT_LOG_TAG, "Failed to allocate recv task when receiving OpenThread plat UDP");
+        pbuf_free(p);
+        return;
     }
     task->socket = (otUdpSocket *)ctx;
     task->recv_buf = p;