diff --git a/components/efuse/src/efuse_controller/keys/with_key_purposes/esp_efuse_api_key.c b/components/efuse/src/efuse_controller/keys/with_key_purposes/esp_efuse_api_key.c
index 2af5f863c2..a177a92ee4 100644
--- a/components/efuse/src/efuse_controller/keys/with_key_purposes/esp_efuse_api_key.c
+++ b/components/efuse/src/efuse_controller/keys/with_key_purposes/esp_efuse_api_key.c
@@ -282,6 +282,19 @@ esp_err_t esp_efuse_write_key(esp_efuse_block_t block, esp_efuse_purpose_t purpo
         ESP_EFUSE_CHK(esp_efuse_write_field_blob(s_table[idx].key, key, key_size_bytes * 8));
         ESP_EFUSE_CHK(esp_efuse_set_key_dis_write(block));
 
+#if SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+        if (block == EFUSE_BLK9 && (
+#if SOC_FLASH_ENCRYPTION_XTS_AES_256
+            purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_1 ||
+            purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_2 ||
+#endif
+            purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_128_KEY)) {
+            ESP_LOGE(TAG, "BLOCK9 can not have the %d purpose because of HW bug (see TRM for more details)", purpose);
+            err = ESP_ERR_NOT_SUPPORTED;
+            goto err_exit;
+        }
+#endif // SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+
         if (purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_128_KEY ||
 #ifdef SOC_FLASH_ENCRYPTION_XTS_AES_256
             purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_1 ||
diff --git a/components/efuse/test/with_key_purposes/test_efuse_keys.c b/components/efuse/test/with_key_purposes/test_efuse_keys.c
index b7a4994e1e..1341795ed3 100644
--- a/components/efuse/test/with_key_purposes/test_efuse_keys.c
+++ b/components/efuse/test/with_key_purposes/test_efuse_keys.c
@@ -47,6 +47,22 @@ TEST_CASE("Test keys and purposes, rd, wr, wr_key_purposes are in the initial st
         printf("EFUSE_BLK_KEY%d, RD, WR, PURPOSE_USER, PURPOSE_USER WR ... OK\n", num_key - EFUSE_BLK_KEY0);
     }
 }
+
+#if SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+TEST_CASE("Test efuse API blocks burning XTS and ECDSA keys into BLOCK9", "[efuse]")
+{
+    uint8_t key[32] = {0};
+    esp_efuse_purpose_t purpose = ESP_EFUSE_KEY_PURPOSE_XTS_AES_128_KEY;
+    TEST_ESP_ERR(ESP_ERR_NOT_SUPPORTED, esp_efuse_write_key(EFUSE_BLK9, purpose, &key, sizeof(key)));
+#if SOC_FLASH_ENCRYPTION_XTS_AES_256
+    purpose = ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_1;
+    TEST_ESP_ERR(ESP_ERR_NOT_SUPPORTED, esp_efuse_write_key(EFUSE_BLK9, purpose, &key, sizeof(key)));
+    purpose = ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_2;
+    TEST_ESP_ERR(ESP_ERR_NOT_SUPPORTED, esp_efuse_write_key(EFUSE_BLK9, purpose, &key, sizeof(key)));
+#endif
+}
+#endif // SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+
 #endif // CONFIG_EFUSE_VIRTUAL
 
 // If using efuse is real, then turn off writing tests.
@@ -118,14 +134,29 @@ TEST_CASE("Test esp_efuse_write_key for virt mode", "[efuse]")
     TEST_ESP_ERR(ESP_ERR_INVALID_ARG, esp_efuse_write_key(EFUSE_BLK_KEY0, tmp_purpose, &rd_key, 33));
     TEST_ESP_ERR(ESP_ERR_INVALID_ARG, esp_efuse_write_key(EFUSE_BLK10, tmp_purpose, &rd_key, sizeof(rd_key)));
 
-    for (esp_efuse_purpose_t purpose = ESP_EFUSE_KEY_PURPOSE_RESERVED; purpose < ESP_EFUSE_KEY_PURPOSE_MAX; ++purpose) {
+    for (esp_efuse_purpose_t g_purpose = ESP_EFUSE_KEY_PURPOSE_USER; g_purpose < ESP_EFUSE_KEY_PURPOSE_MAX; ++g_purpose) {
+        if (g_purpose == ESP_EFUSE_KEY_PURPOSE_USER) {
+            continue;
+        }
         esp_efuse_utility_reset();
         esp_efuse_utility_update_virt_blocks();
         esp_efuse_utility_debug_dump_blocks();
 
-        TEST_ASSERT_FALSE(esp_efuse_find_purpose(purpose, NULL));
+        TEST_ASSERT_FALSE(esp_efuse_find_purpose(g_purpose, NULL));
 
         for (esp_efuse_block_t num_key = (EFUSE_BLK_KEY_MAX - 1); num_key >= EFUSE_BLK_KEY0; --num_key) {
+            esp_efuse_purpose_t purpose = g_purpose;
+#if SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+            if (num_key == EFUSE_BLK9 && (
+#ifdef SOC_FLASH_ENCRYPTION_XTS_AES_256
+                purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_1 ||
+                purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_256_KEY_2 ||
+#endif //#ifdef SOC_EFUSE_SUPPORT_XTS_AES_256_KEYS
+                purpose == ESP_EFUSE_KEY_PURPOSE_XTS_AES_128_KEY)) {
+                printf("BLOCK9 can not have the %d purpose, use RESERVED instead\n", purpose);
+                purpose = ESP_EFUSE_KEY_PURPOSE_RESERVED;
+            }
+#endif // SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
             int id = num_key - EFUSE_BLK_KEY0;
             TEST_ASSERT_EQUAL(id + 1, esp_efuse_count_unused_key_blocks());
             test_write_key(num_key, purpose);
diff --git a/components/soc/esp32c3/include/soc/Kconfig.soc_caps.in b/components/soc/esp32c3/include/soc/Kconfig.soc_caps.in
index ddb8e16f1f..1c635e2eaa 100644
--- a/components/soc/esp32c3/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32c3/include/soc/Kconfig.soc_caps.in
@@ -695,6 +695,10 @@ config SOC_EFUSE_SOFT_DIS_JTAG
     bool
     default y
 
+config SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+    bool
+    default y
+
 config SOC_SECURE_BOOT_V2_RSA
     bool
     default y
diff --git a/components/soc/esp32c3/include/soc/soc_caps.h b/components/soc/esp32c3/include/soc/soc_caps.h
index 18f69561f3..1a5ce1f50d 100644
--- a/components/soc/esp32c3/include/soc/soc_caps.h
+++ b/components/soc/esp32c3/include/soc/soc_caps.h
@@ -320,6 +320,7 @@
 #define SOC_EFUSE_DIS_USB_JTAG 1
 #define SOC_EFUSE_DIS_DIRECT_BOOT 1
 #define SOC_EFUSE_SOFT_DIS_JTAG 1
+#define SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK 1  // AES-XTS key purpose not supported for this block
 
 /*-------------------------- Secure Boot CAPS----------------------------*/
 #define SOC_SECURE_BOOT_V2_RSA              1
diff --git a/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in b/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in
index 65bad0061d..03029234c5 100644
--- a/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in
@@ -667,6 +667,10 @@ config SOC_EFUSE_SOFT_DIS_JTAG
     bool
     default y
 
+config SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+    bool
+    default y
+
 config SOC_SECURE_BOOT_V2_RSA
     bool
     default y
diff --git a/components/soc/esp32h2/include/soc/soc_caps.h b/components/soc/esp32h2/include/soc/soc_caps.h
index a85f1ae429..b75d037aa4 100644
--- a/components/soc/esp32h2/include/soc/soc_caps.h
+++ b/components/soc/esp32h2/include/soc/soc_caps.h
@@ -324,6 +324,7 @@
 #define SOC_EFUSE_DIS_USB_JTAG 1
 #define SOC_EFUSE_DIS_DIRECT_BOOT 1
 #define SOC_EFUSE_SOFT_DIS_JTAG 1
+#define SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK 1  // AES-XTS and ECDSA key purposes not supported for this block
 
 /*-------------------------- Secure Boot CAPS----------------------------*/
 #define SOC_SECURE_BOOT_V2_RSA              1
diff --git a/components/soc/esp32s3/include/soc/Kconfig.soc_caps.in b/components/soc/esp32s3/include/soc/Kconfig.soc_caps.in
index cb8ca4179f..cfe59ae4fb 100644
--- a/components/soc/esp32s3/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32s3/include/soc/Kconfig.soc_caps.in
@@ -943,6 +943,10 @@ config SOC_EFUSE_DIS_DIRECT_BOOT
     bool
     default y
 
+config SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK
+    bool
+    default y
+
 config SOC_SECURE_BOOT_V2_RSA
     bool
     default y
diff --git a/components/soc/esp32s3/include/soc/soc_caps.h b/components/soc/esp32s3/include/soc/soc_caps.h
index e3ee515c53..f8224d1ef4 100644
--- a/components/soc/esp32s3/include/soc/soc_caps.h
+++ b/components/soc/esp32s3/include/soc/soc_caps.h
@@ -394,6 +394,7 @@
 #define SOC_EFUSE_DIS_USB_JTAG 1
 #define SOC_EFUSE_SOFT_DIS_JTAG 1
 #define SOC_EFUSE_DIS_DIRECT_BOOT 1
+#define SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK 1  // AES-XTS key purpose not supported for this block
 
 /*-------------------------- Secure Boot CAPS----------------------------*/
 #define SOC_SECURE_BOOT_V2_RSA              1
diff --git a/docs/en/api-reference/system/efuse.rst b/docs/en/api-reference/system/efuse.rst
index 956675b969..78ba661934 100644
--- a/docs/en/api-reference/system/efuse.rst
+++ b/docs/en/api-reference/system/efuse.rst
@@ -29,6 +29,8 @@ For more details, see *{IDF_TARGET_NAME} Technical Reference Manual* > *eFuse Co
 
 .. only:: not esp32 and not esp32c2
 
+  .. list::
+
     {IDF_TARGET_NAME} has 11 eFuse blocks each of the size of 256 bits (not all bits are available):
 
     * EFUSE_BLK0 is used entirely for system purposes;
@@ -40,7 +42,8 @@ For more details, see *{IDF_TARGET_NAME} Technical Reference Manual* > *eFuse Co
     * EFUSE_BLK6 (also named EFUSE_BLK_KEY2) can be used as key (for secure_boot or flash_encryption) or for user purposes;
     * EFUSE_BLK7 (also named EFUSE_BLK_KEY3) can be used as key (for secure_boot or flash_encryption) or for user purposes;
     * EFUSE_BLK8 (also named EFUSE_BLK_KEY4) can be used as key (for secure_boot or flash_encryption) or for user purposes;
-    * EFUSE_BLK9 (also named EFUSE_BLK_KEY5) can be used as key (for secure_boot or flash_encryption) or for user purposes;
+    :SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK: * EFUSE_BLK9 (also named EFUSE_BLK_KEY5) can be used for any purpose except for flash encryption (due to a HW bug);
+    :not SOC_EFUSE_BLOCK9_KEY_PURPOSE_QUIRK: * EFUSE_BLK9 (also named EFUSE_BLK_KEY5) can be used as key (for secure_boot or flash_encryption) or for user purposes;
     * EFUSE_BLK10 (also named EFUSE_BLK_SYS_DATA_PART2) is reseved for system purposes.
 
 .. only:: esp32c2