diff --git a/samples/bluetooth/central_and_peripheral_hr/boards/nrf54l15dk_nrf54l15_cpuapp.conf b/samples/bluetooth/central_and_peripheral_hr/boards/nrf54l15dk_nrf54l15_cpuapp.conf
new file mode 100644
index 000000000000..06c0f94b6568
--- /dev/null
+++ b/samples/bluetooth/central_and_peripheral_hr/boards/nrf54l15dk_nrf54l15_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=3584
diff --git a/samples/bluetooth/central_and_peripheral_hr/prj.conf b/samples/bluetooth/central_and_peripheral_hr/prj.conf
index dbf14acc5645..df8c2487680b 100644
--- a/samples/bluetooth/central_and_peripheral_hr/prj.conf
+++ b/samples/bluetooth/central_and_peripheral_hr/prj.conf
@@ -34,5 +34,6 @@ CONFIG_FLASH_MAP=y
 CONFIG_SETTINGS=y
 
 CONFIG_HEAP_MEM_POOL_SIZE=1024
+CONFIG_MAIN_STACK_SIZE=2048
 
 CONFIG_DK_LIBRARY=y
diff --git a/samples/bluetooth/central_bas/prj.conf b/samples/bluetooth/central_bas/prj.conf
index 3deae57b598a..fb7ff8a6674e 100644
--- a/samples/bluetooth/central_bas/prj.conf
+++ b/samples/bluetooth/central_bas/prj.conf
@@ -24,3 +24,5 @@ CONFIG_FLASH_PAGE_LAYOUT=y
 CONFIG_FLASH_MAP=y
 
 CONFIG_DK_LIBRARY=y
+
+CONFIG_MAIN_STACK_SIZE=2048
diff --git a/samples/bluetooth/peripheral_bms/boards/nrf54l15dk_nrf54l15_cpuapp.conf b/samples/bluetooth/peripheral_bms/boards/nrf54l15dk_nrf54l15_cpuapp.conf
new file mode 100644
index 000000000000..06c0f94b6568
--- /dev/null
+++ b/samples/bluetooth/peripheral_bms/boards/nrf54l15dk_nrf54l15_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=3584
diff --git a/samples/bluetooth/peripheral_bms/prj.conf b/samples/bluetooth/peripheral_bms/prj.conf
index 3be4aafc12b5..24ffebaf386d 100644
--- a/samples/bluetooth/peripheral_bms/prj.conf
+++ b/samples/bluetooth/peripheral_bms/prj.conf
@@ -6,6 +6,7 @@
 CONFIG_NCS_SAMPLES_DEFAULTS=y
 CONFIG_DK_LIBRARY=y
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+CONFIG_MAIN_STACK_SIZE=2048
 
 CONFIG_BT=y
 CONFIG_BT_PERIPHERAL=y
diff --git a/samples/bluetooth/peripheral_cgms/boards/nrf54l15dk_nrf54l15_cpuapp.conf b/samples/bluetooth/peripheral_cgms/boards/nrf54l15dk_nrf54l15_cpuapp.conf
new file mode 100644
index 000000000000..06c0f94b6568
--- /dev/null
+++ b/samples/bluetooth/peripheral_cgms/boards/nrf54l15dk_nrf54l15_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=3584
diff --git a/samples/bluetooth/peripheral_cgms/prj.conf b/samples/bluetooth/peripheral_cgms/prj.conf
index e7ca20ca3101..603427cb8ece 100644
--- a/samples/bluetooth/peripheral_cgms/prj.conf
+++ b/samples/bluetooth/peripheral_cgms/prj.conf
@@ -23,3 +23,4 @@ CONFIG_LOG=y
 CONFIG_BT_CGMS_LOG_LEVEL_INF=y
 CONFIG_SFLOAT=y
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=1280
+CONFIG_MAIN_STACK_SIZE=2048
diff --git a/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l05_cpuapp.conf b/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l05_cpuapp.conf
new file mode 100644
index 000000000000..5b453c66f15c
--- /dev/null
+++ b/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l05_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=4096
diff --git a/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l10_cpuapp.conf b/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l10_cpuapp.conf
new file mode 100644
index 000000000000..5b453c66f15c
--- /dev/null
+++ b/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l10_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=4096
diff --git a/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l15_cpuapp.conf b/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l15_cpuapp.conf
new file mode 100644
index 000000000000..5b453c66f15c
--- /dev/null
+++ b/samples/bluetooth/peripheral_lbs/boards/nrf54l15dk_nrf54l15_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=4096
diff --git a/samples/bluetooth/peripheral_lbs/prj.conf b/samples/bluetooth/peripheral_lbs/prj.conf
index 63a681872413..15c07354db51 100644
--- a/samples/bluetooth/peripheral_lbs/prj.conf
+++ b/samples/bluetooth/peripheral_lbs/prj.conf
@@ -15,3 +15,4 @@ CONFIG_BT_LBS_POLL_BUTTON=y
 CONFIG_DK_LIBRARY=y
 
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+CONFIG_MAIN_STACK_SIZE=2048
diff --git a/samples/bluetooth/peripheral_status/boards/nrf54l15dk_nrf54l15_cpuapp.conf b/samples/bluetooth/peripheral_status/boards/nrf54l15dk_nrf54l15_cpuapp.conf
new file mode 100644
index 000000000000..06c0f94b6568
--- /dev/null
+++ b/samples/bluetooth/peripheral_status/boards/nrf54l15dk_nrf54l15_cpuapp.conf
@@ -0,0 +1,7 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+CONFIG_MAIN_STACK_SIZE=3584
diff --git a/samples/bluetooth/peripheral_status/prj.conf b/samples/bluetooth/peripheral_status/prj.conf
index 3602c3a22d43..2f7071373343 100644
--- a/samples/bluetooth/peripheral_status/prj.conf
+++ b/samples/bluetooth/peripheral_status/prj.conf
@@ -14,3 +14,4 @@ CONFIG_BT_NSMS=y
 CONFIG_DK_LIBRARY=y
 
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+CONFIG_MAIN_STACK_SIZE=2048