diff --git a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/app_common.dtsi b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/app_common.dtsi
index 20df4aa3b0c6..3440d1090a35 100644
--- a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/app_common.dtsi
+++ b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/app_common.dtsi
@@ -65,18 +65,6 @@
 	};
 };
 
-/* Define the necessary aliases for the MCUboot slots that will be used by the DFU transports.
- * Due to the build system limitation, the allowed size of the application image (configured by
- * the code partition DTS node) is incorrectly increased by the size allocated for the radio image.
- */
-slot0_partition: &cpuapp_slot0_partition {
-	label = "image-0";
-};
-
-slot1_partition: &cpuapp_slot1_partition {
-	label = "image-1";
-};
-
 secondary_app_partition: &cpuapp_slot1_partition {};
 
 /* Remove the undefined property value from the disabled VPR cores to prevent build errors. */
diff --git a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/images/mcuboot/app.overlay b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/images/mcuboot/app.overlay
index 6219102df240..fd91f4705b22 100644
--- a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/images/mcuboot/app.overlay
+++ b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/images/mcuboot/app.overlay
@@ -15,17 +15,6 @@
 	};
 };
 
-/* Define the necessary aliases for the DTS partition nodes that contain the application and
- * radio images.
- */
-slot0_partition: &cpuapp_slot0_partition {
-	label = "image-0";
-};
-
-slot1_partition: &cpuapp_slot1_partition {
-	label = "image-1";
-};
-
 /* Remove the undefined property value from the disabled VPR cores to prevent build errors. */
 &cpuflpr_vpr {
 	/delete-property/ source-memory;
diff --git a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/memory_map.dtsi b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/memory_map.dtsi
index e3c28a73fe7f..f86100073035 100644
--- a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/memory_map.dtsi
+++ b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpuapp/memory_map.dtsi
@@ -21,30 +21,33 @@
 			reg = <0x30000 DT_SIZE_K(24)>;
 		};
 
-		/* Due to the build system limitation, the allowed size of the application image
-		 * (configured by the code partition DTS node) is incorrectly increased by the size
-		 * allocated for the radio image.
+		/* When using merged slots, the definition of MCUboot slots is common for all
+		 * images and points to the "merged" partition.
 		 */
-		cpuapp_slot0_partition: partition@36000 {
+		slot0_partition: partition@36000 {
 			reg = <0x36000 DT_SIZE_K(808)>;
 		};
 
+		cpuapp_slot0_partition: partition@36800 {
+			reg = <0x36800 DT_SIZE_K(586)>;
+		};
+
 		cpurad_slot0_partition: partition@c9000 {
-			reg = <0xc9000 DT_SIZE_K(220)>;
+			reg = <0xc9000 (DT_SIZE_K(220) - 224)>;
 		};
 
 		/* Partitions belonging to the MRAM_11 memory block. */
 
-		/* Due to the build system limitation, the allowed size of the application image
-		 * (configured by the code partition DTS node) is incorrectly increased by the size
-		 * allocated for the radio image.
-		 */
-		cpuapp_slot1_partition: partition@100000 {
+		slot1_partition: partition@100000 {
 			reg = <0x100000 DT_SIZE_K(808)>;
 		};
 
+		cpuapp_slot1_partition: partition@100800 {
+			reg = <0x100800 DT_SIZE_K(586)>;
+		};
+
 		cpurad_slot1_partition: partition@193000 {
-			reg = <0x193000 DT_SIZE_K(220)>;
+			reg = <0x193000 (DT_SIZE_K(220) - 224)>;
 		};
 
 		storage_partition: partition@1ca000 {
diff --git a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpurad/images/ipc_radio/app.overlay b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpurad/images/ipc_radio/app.overlay
index 640b10a81d82..6071badb7f3a 100644
--- a/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpurad/images/ipc_radio/app.overlay
+++ b/applications/nrf_desktop/configuration/nrf54h20dk_nrf54h20_cpurad/images/ipc_radio/app.overlay
@@ -6,12 +6,4 @@
 
 #include "../../../nrf54h20dk_nrf54h20_cpuapp/memory_map.dtsi"
 
-slot0_partition: &cpurad_slot0_partition {
-	label = "image-0";
-};
-
-slot1_partition: &cpurad_slot1_partition {
-	label = "image-1";
-};
-
 secondary_app_partition: &cpurad_slot1_partition {};
diff --git a/cmake/sysbuild/mcuboot_nrf54h20.cmake b/cmake/sysbuild/mcuboot_nrf54h20.cmake
index c8bd20a57b1f..a81c7805d9c2 100644
--- a/cmake/sysbuild/mcuboot_nrf54h20.cmake
+++ b/cmake/sysbuild/mcuboot_nrf54h20.cmake
@@ -9,6 +9,7 @@ if(SB_CONFIG_MCUBOOT_SIGN_MERGED_BINARY)
   set(MERGED_IMAGES_HEX "mcuboot_merged.hex")
   UpdateableImage_Get(images GROUP "DEFAULT")
 
+  check_image_boundaries("slot0_partition" "${images}")
   merge_images_nrf54h20(${MERGED_IMAGES_HEX} "${images}")
   # Since all bootloader-enabled images are merged, disable programming subimages.
   list(REMOVE_ITEM images "${DEFAULT_IMAGE}")
@@ -19,6 +20,7 @@ if(SB_CONFIG_MCUBOOT_SIGN_MERGED_BINARY)
   UpdateableImage_Get(variants GROUP "VARIANT")
 
   if(variants)
+    check_image_boundaries("slot1_partition" "${variants}")
     merge_images_nrf54h20(${MERGED_IMAGES_SECONDARY_HEX} "${variants}")
     list(REMOVE_ITEM variants "mcuboot_secondary_app")
     disable_programming_nrf54h20("${variants}")
diff --git a/cmake/sysbuild/sign_nrf54h20.cmake b/cmake/sysbuild/sign_nrf54h20.cmake
index 97099da96e6e..94460beb169a 100644
--- a/cmake/sysbuild/sign_nrf54h20.cmake
+++ b/cmake/sysbuild/sign_nrf54h20.cmake
@@ -2,6 +2,47 @@
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 
+function(check_image_boundaries merged_partition images)
+  # Predefine the MCUboot header size.
+  set(MCUBOOT_HEADER_SIZE 0x800)
+
+  # Fetch merged slot details from the mcuboot image.
+  dt_chosen(flash_node TARGET mcuboot PROPERTY "zephyr,flash")
+  dt_nodelabel(slot_path TARGET mcuboot NODELABEL "${merged_partition}" REQUIRED)
+  dt_reg_addr(slot_addr TARGET mcuboot PATH ${slot_path})
+  dt_reg_size(slot_size TARGET mcuboot PATH ${slot_path})
+
+  # Calculate boundaries of the usable area.
+  sysbuild_get(mcuboot_image_footer_size IMAGE mcuboot CACHE)
+  math(EXPR slot_max_addr "${slot_addr} + ${slot_size} - ${mcuboot_image_footer_size}" OUTPUT_FORMAT HEXADECIMAL)
+  math(EXPR slot_min_addr "${slot_addr} + ${MCUBOOT_HEADER_SIZE}" OUTPUT_FORMAT HEXADECIMAL)
+
+  # Iterate over images and check that they fit in the merged slots.
+  foreach(image ${images})
+    set(start_offset)
+    set(end_offset)
+    sysbuild_get(start_offset IMAGE ${image} VAR CONFIG_ROM_START_OFFSET
+      KCONFIG)
+    sysbuild_get(end_offset IMAGE ${image} VAR CONFIG_ROM_END_OFFSET
+      KCONFIG)
+    dt_chosen(code_flash TARGET ${image} PROPERTY "zephyr,code-partition")
+    dt_reg_addr(code_addr TARGET ${image} PATH ${code_flash})
+    dt_reg_size(code_size TARGET ${image} PATH ${code_flash})
+
+    math(EXPR code_end_addr "${code_addr} + ${code_size} - ${end_offset}" OUTPUT_FORMAT HEXADECIMAL)
+    math(EXPR code_start_addr "${code_addr} + ${start_offset}" OUTPUT_FORMAT HEXADECIMAL)
+
+    if((${code_end_addr} GREATER ${slot_max_addr}) OR
+       (${code_start_addr} LESS ${slot_min_addr}))
+      message(FATAL_ERROR "Variant image ${image} "
+                          "(${code_start_addr}, ${code_end_addr}) "
+                          "does not fit in the merged ${merged_partition} "
+                          "(${slot_min_addr}, ${slot_max_addr})")
+      return()
+    endif()
+  endforeach()
+endfunction()
+
 function(merge_images_nrf54h20 output_artifact images)
   find_program(MERGEHEX mergehex.py HINTS ${ZEPHYR_BASE}/scripts/build/ NAMES
     mergehex NAMES_PER_DIR)
@@ -206,10 +247,14 @@ function(mcuboot_sign_merged_nrf54h20 merged_hex main_image)
      SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP)
     if(CONFIG_NCS_IS_VARIANT_IMAGE)
       set(slot_size ${slot1_size})
+      set(slot_addr ${slot1_addr})
     else()
       set(slot_size ${slot0_size})
+      set(slot_addr ${slot0_addr})
     endif()
-    set(imgtool_rom_command --rom-fixed ${code_addr})
+    # Adjust start offset, based on the active slot and code partition address.
+    math(EXPR start_offset "${start_offset} + ${code_addr} - ${slot_addr}")
+    set(imgtool_rom_command --rom-fixed ${slot_addr})
   else()
     message(FATAL_ERROR "Only Direct XIP MCUboot modes are supported.")
     return()
@@ -218,7 +263,8 @@ function(mcuboot_sign_merged_nrf54h20 merged_hex main_image)
   # Basic 'imgtool sign' command with known image information.
   set(imgtool_sign ${PYTHON_EXECUTABLE} ${IMGTOOL} sign
       --version ${CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION} --header-size
-      ${start_offset} --slot-size ${slot_size} ${imgtool_rom_command})
+      ${start_offset} --slot-size ${slot_size} --pad-header
+      ${imgtool_rom_command})
   set(imgtool_args --align ${write_block_size} ${imgtool_args})
 
   # Extensionless prefix of any output file.
@@ -284,8 +330,8 @@ function(mcuboot_sign_merged_nrf54h20 merged_hex main_image)
         "${output}.signed.confirmed.hex" CACHE FILEPATH
         "Signed and confirmed kernel hex file" FORCE)
       list(APPEND imgtool_cmd COMMAND
-        ${imgtool_sign} ${imgtool_args} --pad --confirm ${merged_hex}
-        ${output}.signed.confirmed.hex)
+        ${imgtool_sign} ${imgtool_args} --pad --pad-header --confirm
+        ${merged_hex} ${output}.signed.confirmed.hex)
     endif()
 
     if(NOT "${keyfile_enc}" STREQUAL "")
diff --git a/samples/dfu/ab/boards/nrf54h20dk_nrf54h20_cpuapp.overlay b/samples/dfu/ab/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
index af0e3a2720c9..33db389c9b8a 100644
--- a/samples/dfu/ab/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
+++ b/samples/dfu/ab/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
@@ -11,3 +11,5 @@
 		zephyr,boot-mode = &boot_request;
 	};
 };
+
+secondary_app_partition: &cpuapp_slot1_partition {};
diff --git a/samples/dfu/ab/src/ab_utils.c b/samples/dfu/ab/src/ab_utils.c
index d06fffe9db53..3362dfd37fdd 100644
--- a/samples/dfu/ab/src/ab_utils.c
+++ b/samples/dfu/ab/src/ab_utils.c
@@ -39,12 +39,18 @@ LOG_MODULE_DECLARE(ab_sample);
 
 #define SLOT_A_OFFSET FIXED_PARTITION_OFFSET(SLOT_A_PARTITION)
 #define SLOT_B_OFFSET FIXED_PARTITION_OFFSET(SLOT_B_PARTITION)
+#define SLOT_A_SIZE   FIXED_PARTITION_SIZE(SLOT_A_PARTITION)
+#define SLOT_B_SIZE   FIXED_PARTITION_SIZE(SLOT_B_PARTITION)
 
 #define SLOT_A_FLASH_AREA_ID FIXED_PARTITION_ID(SLOT_A_PARTITION)
 #define SLOT_B_FLASH_AREA_ID FIXED_PARTITION_ID(SLOT_B_PARTITION)
 
-#define IS_SLOT_A (CODE_PARTITION_OFFSET == SLOT_A_OFFSET)
-#define IS_SLOT_B (CODE_PARTITION_OFFSET == SLOT_B_OFFSET)
+#define IS_SLOT_A                                                                                  \
+	(CODE_PARTITION_OFFSET >= SLOT_A_OFFSET &&                                                 \
+	 CODE_PARTITION_OFFSET < SLOT_A_OFFSET + SLOT_A_SIZE)
+#define IS_SLOT_B                                                                                  \
+	(CODE_PARTITION_OFFSET >= SLOT_B_OFFSET &&                                                 \
+	 CODE_PARTITION_OFFSET < SLOT_B_OFFSET + SLOT_B_SIZE)
 
 #endif /* CONFIG_PARTITION_MANAGER_ENABLED */
 
diff --git a/samples/zephyr/smp_svr_mini_boot/boards/nrf54h20dk_nrf54h20_cpuapp.overlay b/samples/dfu/ab/sysbuild/ipc_radio.overlay
similarity index 52%
rename from samples/zephyr/smp_svr_mini_boot/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
rename to samples/dfu/ab/sysbuild/ipc_radio.overlay
index e7aabc746b40..b5f9df923418 100644
--- a/samples/zephyr/smp_svr_mini_boot/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
+++ b/samples/dfu/ab/sysbuild/ipc_radio.overlay
@@ -4,4 +4,6 @@
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-#include "../sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi"
+#include "nrf54h20dk_nrf54h20_memory_map.dtsi"
+
+secondary_app_partition: &cpurad_slot1_partition {};
diff --git a/samples/dfu/ab/sysbuild/nrf54h20dk_nrf54h20_memory_map.dtsi b/samples/dfu/ab/sysbuild/nrf54h20dk_nrf54h20_memory_map.dtsi
index 30efd3fbe45a..3aa133effe69 100644
--- a/samples/dfu/ab/sysbuild/nrf54h20dk_nrf54h20_memory_map.dtsi
+++ b/samples/dfu/ab/sysbuild/nrf54h20dk_nrf54h20_memory_map.dtsi
@@ -5,14 +5,59 @@
  */
 
 /* On nRF54H20 the Direct XIP mode is supported in the merged slot configuration
- * Merge application and radio slots by extending the application partition.
+ * Extend slot0_partition and slot1_partition to cover both application and
+ * radio images, as well as MCUboot image metadata (header and trailer).
+ * Those partitions will be used by MCUboot to verify the merged image to boot.
+ * Apart from that, they will be used by the MCUmgr subsystem to correctly
+ * handle flags, stored inside the MCUboot image trailer.
+ * Use cpu<app|rad>_slot<0|1>_partition as zephyr,code-partition, so the
+ * application and radio sizes are correctly reported.
  */
-&cpuapp_slot0_partition {
-	reg = <0x40000 DT_SIZE_K(656)>;
-};
+/delete-node/&cpuapp_slot0_partition;
+/delete-node/&cpuapp_slot1_partition;
+/delete-node/&cpurad_slot0_partition;
+/delete-node/&cpurad_slot1_partition;
+
+&mram1x {
+	partitions {
+		/* Merged partition used by the MCUboot (variant 0). */
+		slot0_partition: partition@40000 {
+			reg = <0x40000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 0).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot0_partition: partition@40800 {
+			reg = <0x40800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 0).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot0_partition: partition@92000 {
+			reg = <0x92000 (DT_SIZE_K(328) - 224)>;
+		};
 
-&cpuapp_slot1_partition {
-	reg = <0x100000 DT_SIZE_K(656)>;
+		/* Merged partition used by the MCUboot (variant 1). */
+		slot1_partition: partition@100000 {
+			reg = <0x100000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 1).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot1_partition: partition@100800 {
+			reg = <0x100800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 1).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot1_partition: partition@152000 {
+			reg = <0x152000 (DT_SIZE_K(328) - 224)>;
+		};
+	};
 };
 
 / {
diff --git a/samples/zephyr/smp_svr_mini_boot/boards/nrf54h20dk_nrf54h20_cpuapp_direct_xip.overlay b/samples/zephyr/smp_svr_mini_boot/boards/nrf54h20dk_nrf54h20_cpuapp_direct_xip.overlay
new file mode 100644
index 000000000000..293a95ef326f
--- /dev/null
+++ b/samples/zephyr/smp_svr_mini_boot/boards/nrf54h20dk_nrf54h20_cpuapp_direct_xip.overlay
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "../sysbuild/nrf54h20dk_nrf54h20_memory_map_direct_xip.dtsi"
+
+secondary_app_partition: &cpuapp_slot1_partition {};
diff --git a/samples/zephyr/smp_svr_mini_boot/sample.yaml b/samples/zephyr/smp_svr_mini_boot/sample.yaml
index 2d9dd0941df8..cc065a3d2b6d 100644
--- a/samples/zephyr/smp_svr_mini_boot/sample.yaml
+++ b/samples/zephyr/smp_svr_mini_boot/sample.yaml
@@ -13,6 +13,7 @@ common:
 tests:
   sample.smp_svr_mini_boot:
     extra_args:
+      - FILE_SUFFIX="direct_xip"
       - SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP=y
     platform_allow:
       - nrf54l15dk/nrf54l15/cpuapp
diff --git a/samples/zephyr/smp_svr_mini_boot/sysbuild/ipc_radio_direct_xip.overlay b/samples/zephyr/smp_svr_mini_boot/sysbuild/ipc_radio_direct_xip.overlay
new file mode 100644
index 000000000000..0603a27bea2f
--- /dev/null
+++ b/samples/zephyr/smp_svr_mini_boot/sysbuild/ipc_radio_direct_xip.overlay
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "nrf54h20dk_nrf54h20_memory_map_direct_xip.dtsi"
+
+secondary_app_partition: &cpurad_slot1_partition {};
diff --git a/samples/zephyr/smp_svr_mini_boot/sysbuild/mcuboot/boards/nrf54h20dk_nrf54h20_cpuapp.overlay b/samples/zephyr/smp_svr_mini_boot/sysbuild/mcuboot/boards/nrf54h20dk_nrf54h20_cpuapp_direct_xip.overlay
similarity index 73%
rename from samples/zephyr/smp_svr_mini_boot/sysbuild/mcuboot/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
rename to samples/zephyr/smp_svr_mini_boot/sysbuild/mcuboot/boards/nrf54h20dk_nrf54h20_cpuapp_direct_xip.overlay
index f179ff7f987a..31ba803845dc 100644
--- a/samples/zephyr/smp_svr_mini_boot/sysbuild/mcuboot/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
+++ b/samples/zephyr/smp_svr_mini_boot/sysbuild/mcuboot/boards/nrf54h20dk_nrf54h20_cpuapp_direct_xip.overlay
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-#include "../../nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi"
+#include "../../nrf54h20dk_nrf54h20_memory_map_direct_xip.dtsi"
 
 / {
 	chosen {
diff --git a/samples/zephyr/smp_svr_mini_boot/sysbuild/nrf54h20dk_nrf54h20_memory_map_direct_xip.dtsi b/samples/zephyr/smp_svr_mini_boot/sysbuild/nrf54h20dk_nrf54h20_memory_map_direct_xip.dtsi
new file mode 100644
index 000000000000..1e0b16ba3ed9
--- /dev/null
+++ b/samples/zephyr/smp_svr_mini_boot/sysbuild/nrf54h20dk_nrf54h20_memory_map_direct_xip.dtsi
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+/* On nRF54H20 the Direct XIP mode is supported in the merged slot configuration
+ * Extend slot0_partition and slot1_partition to cover both application and
+ * radio images, as well as MCUboot image metadata (header and trailer).
+ * Those partitions will be used by MCUboot to verify the merged image to boot.
+ * Apart from that, they will be used by the MCUmgr subsystem to correctly
+ * handle flags, stored inside the MCUboot image trailer.
+ * Use cpu<app|rad>_slot<0|1>_partition as zephyr,code-partition, so the
+ * application and radio sizes are correctly reported.
+ */
+/delete-node/&cpuapp_slot0_partition;
+/delete-node/&cpuapp_slot1_partition;
+/delete-node/&cpurad_slot0_partition;
+/delete-node/&cpurad_slot1_partition;
+
+&mram1x {
+	partitions {
+		/* Merged partition used by the MCUboot (variant 0). */
+		slot0_partition: partition@40000 {
+			reg = <0x40000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 0).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot0_partition: partition@40800 {
+			reg = <0x40800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 0).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot0_partition: partition@92000 {
+			reg = <0x92000 (DT_SIZE_K(328) - 224)>;
+		};
+
+		/* Merged partition used by the MCUboot (variant 1). */
+		slot1_partition: partition@100000 {
+			reg = <0x100000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 1).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot1_partition: partition@100800 {
+			reg = <0x100800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 1).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot1_partition: partition@152000 {
+			reg = <0x152000 (DT_SIZE_K(328) - 224)>;
+		};
+	};
+};
diff --git a/samples/zephyr/smp_svr_mini_boot/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi b/samples/zephyr/smp_svr_mini_boot/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi
deleted file mode 100644
index ab153f7b438e..000000000000
--- a/samples/zephyr/smp_svr_mini_boot/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi
+++ /dev/null
@@ -1,16 +0,0 @@
-/*
- * Copyright (c) 2025 Nordic Semiconductor ASA
- *
- * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
- */
-
-/* On nRF54H20 the Direct XIP mode is supported in the merged slot configuration
- * Merge application and radio slots by extending the application parition.
- */
-&cpuapp_slot0_partition {
-	reg = <0x40000 DT_SIZE_K(656)>;
-};
-
-&cpuapp_slot1_partition {
-	reg = <0x100000 DT_SIZE_K(656)>;
-};
diff --git a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_merged_slot.overlay b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_merged_slot.overlay
index e7aabc746b40..7e084c296458 100644
--- a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_merged_slot.overlay
+++ b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_merged_slot.overlay
@@ -5,3 +5,5 @@
  */
 
 #include "../sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi"
+
+secondary_app_partition: &cpuapp_slot1_partition {};
diff --git a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_requests.overlay b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_requests.overlay
index 4cb253a13f44..5d190ae9d441 100644
--- a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_requests.overlay
+++ b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/boards/nrf54h20dk_nrf54h20_cpuapp_requests.overlay
@@ -11,3 +11,5 @@
 		zephyr,boot-mode = &boot_request;
 	};
 };
+
+secondary_app_partition: &cpuapp_slot1_partition {};
diff --git a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/ipc_radio_merged_slot.overlay b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/ipc_radio_merged_slot.overlay
new file mode 100644
index 000000000000..3bb10e06b9fa
--- /dev/null
+++ b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/ipc_radio_merged_slot.overlay
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi"
+
+secondary_app_partition: &cpurad_slot1_partition {};
diff --git a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/ipc_radio_requests.overlay b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/ipc_radio_requests.overlay
new file mode 100644
index 000000000000..e4dfbb0f9b1d
--- /dev/null
+++ b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/ipc_radio_requests.overlay
@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include "nrf54h20dk_nrf54h20_memory_map_requests.dtsi"
+
+secondary_app_partition: &cpurad_slot1_partition {};
diff --git a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi
index ab153f7b438e..1e0b16ba3ed9 100644
--- a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi
+++ b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_merged_slot.dtsi
@@ -5,12 +5,57 @@
  */
 
 /* On nRF54H20 the Direct XIP mode is supported in the merged slot configuration
- * Merge application and radio slots by extending the application parition.
+ * Extend slot0_partition and slot1_partition to cover both application and
+ * radio images, as well as MCUboot image metadata (header and trailer).
+ * Those partitions will be used by MCUboot to verify the merged image to boot.
+ * Apart from that, they will be used by the MCUmgr subsystem to correctly
+ * handle flags, stored inside the MCUboot image trailer.
+ * Use cpu<app|rad>_slot<0|1>_partition as zephyr,code-partition, so the
+ * application and radio sizes are correctly reported.
  */
-&cpuapp_slot0_partition {
-	reg = <0x40000 DT_SIZE_K(656)>;
-};
+/delete-node/&cpuapp_slot0_partition;
+/delete-node/&cpuapp_slot1_partition;
+/delete-node/&cpurad_slot0_partition;
+/delete-node/&cpurad_slot1_partition;
+
+&mram1x {
+	partitions {
+		/* Merged partition used by the MCUboot (variant 0). */
+		slot0_partition: partition@40000 {
+			reg = <0x40000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 0).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot0_partition: partition@40800 {
+			reg = <0x40800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 0).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot0_partition: partition@92000 {
+			reg = <0x92000 (DT_SIZE_K(328) - 224)>;
+		};
+
+		/* Merged partition used by the MCUboot (variant 1). */
+		slot1_partition: partition@100000 {
+			reg = <0x100000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 1).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot1_partition: partition@100800 {
+			reg = <0x100800 DT_SIZE_K(326)>;
+		};
 
-&cpuapp_slot1_partition {
-	reg = <0x100000 DT_SIZE_K(656)>;
+		/* Radio code partition (variant 1).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot1_partition: partition@152000 {
+			reg = <0x152000 (DT_SIZE_K(328) - 224)>;
+		};
+	};
 };
diff --git a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_requests.dtsi b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_requests.dtsi
index 72b049e71111..3aa133effe69 100644
--- a/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_requests.dtsi
+++ b/samples/zephyr/subsys/mgmt/mcumgr/smp_svr/sysbuild/nrf54h20dk_nrf54h20_memory_map_requests.dtsi
@@ -5,14 +5,59 @@
  */
 
 /* On nRF54H20 the Direct XIP mode is supported in the merged slot configuration
- * Merge application and radio slots by extending the application parition.
+ * Extend slot0_partition and slot1_partition to cover both application and
+ * radio images, as well as MCUboot image metadata (header and trailer).
+ * Those partitions will be used by MCUboot to verify the merged image to boot.
+ * Apart from that, they will be used by the MCUmgr subsystem to correctly
+ * handle flags, stored inside the MCUboot image trailer.
+ * Use cpu<app|rad>_slot<0|1>_partition as zephyr,code-partition, so the
+ * application and radio sizes are correctly reported.
  */
-&cpuapp_slot0_partition {
-	reg = <0x40000 DT_SIZE_K(656)>;
-};
+/delete-node/&cpuapp_slot0_partition;
+/delete-node/&cpuapp_slot1_partition;
+/delete-node/&cpurad_slot0_partition;
+/delete-node/&cpurad_slot1_partition;
+
+&mram1x {
+	partitions {
+		/* Merged partition used by the MCUboot (variant 0). */
+		slot0_partition: partition@40000 {
+			reg = <0x40000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 0).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot0_partition: partition@40800 {
+			reg = <0x40800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 0).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot0_partition: partition@92000 {
+			reg = <0x92000 (DT_SIZE_K(328) - 224)>;
+		};
 
-&cpuapp_slot1_partition {
-	reg = <0x100000 DT_SIZE_K(656)>;
+		/* Merged partition used by the MCUboot (variant 1). */
+		slot1_partition: partition@100000 {
+			reg = <0x100000 DT_SIZE_K(656)>;
+		};
+
+		/* Application code partition (variant 1).
+		 * Offset by the MCUboot header size (2048 bytes).
+		 */
+		cpuapp_slot1_partition: partition@100800 {
+			reg = <0x100800 DT_SIZE_K(326)>;
+		};
+
+		/* Radio code partition (variant 1).
+		 * Reduced by the MCUboot trailer size (224 bytes).
+		 */
+		cpurad_slot1_partition: partition@152000 {
+			reg = <0x152000 (DT_SIZE_K(328) - 224)>;
+		};
+	};
 };
 
 / {
diff --git a/subsys/bootloader/Kconfig b/subsys/bootloader/Kconfig
index f2f9d5e4f02a..163752667869 100644
--- a/subsys/bootloader/Kconfig
+++ b/subsys/bootloader/Kconfig
@@ -170,4 +170,9 @@ config MCUBOOT_BOOTLOADER_SIGNATURE_TYPE_PURE
 	help
 	  This is a Kconfig which is informative only, the value should not be changed.
 
+config NCS_MCUBOOT_BOOTLOADER_SIGN_MERGED_BINARY
+	bool "Sign merged binary instead of individual images"
+	help
+	  This is a Kconfig which is informative only, the value should not be changed.
+
 endmenu
diff --git a/sysbuild/CMakeLists.txt b/sysbuild/CMakeLists.txt
index 0a0118ce43ff..a0d6fc8fb9d7 100644
--- a/sysbuild/CMakeLists.txt
+++ b/sysbuild/CMakeLists.txt
@@ -693,6 +693,8 @@ function(${SYSBUILD_CURRENT_MODULE_NAME}_pre_cmake)
   if(SB_CONFIG_MCUBOOT_SIGN_MERGED_BINARY AND SB_CONFIG_SOC_NRF54H20)
     UpdateableImage_Get(images ALL)
     foreach(image ${images})
+      set_config_bool(${image} CONFIG_NCS_MCUBOOT_BOOTLOADER_SIGN_MERGED_BINARY
+        true)
       set(${image}_SIGNING_SCRIPT
         "${ZEPHYR_NRF_MODULE_DIR}/cmake/sysbuild/image_signing_nrf54h20.cmake"
          CACHE INTERNAL "MCUboot signing script" FORCE)
diff --git a/west.yml b/west.yml
index 5c06bfe1c7ea..2c0bde2678d8 100644
--- a/west.yml
+++ b/west.yml
@@ -65,7 +65,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 69ad0523f95f13d1de356c19575301ce3de4959e
+      revision: pull/3310/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above
@@ -128,7 +128,7 @@ manifest:
           compare-by-default: true
     - name: mcuboot
       repo-path: sdk-mcuboot
-      revision: 85349537b3bc4e8e9e7542abd0303adf28177dcb
+      revision: pull/538/head
       path: bootloader/mcuboot
     - name: qcbor
       url: https://github.com/laurencelundblade/QCBOR