diff --git a/samples/suit/flash_companion/prj.conf b/samples/suit/flash_companion/prj.conf
index 02c6f19412f3..13c86a637e00 100644
--- a/samples/suit/flash_companion/prj.conf
+++ b/samples/suit/flash_companion/prj.conf
@@ -9,8 +9,8 @@ CONFIG_NUM_PREEMPT_PRIORITIES=0
 CONFIG_MULTITHREADING=y
 CONFIG_NUM_COOP_PRIORITIES=16
 CONFIG_NUM_METAIRQ_PRIORITIES=0
-CONFIG_SCHED_DUMB=y
-CONFIG_WAITQ_DUMB=y
+CONFIG_SCHED_SIMPLE=y
+CONFIG_WAITQ_SIMPLE=y
 
 # Enable peripherals needed by the flash companion firmware
 CONFIG_GPIO=y
diff --git a/scripts/quarantine_zephyr.yaml b/scripts/quarantine_zephyr.yaml
index 4cd39cc1f62d..d752d231ca4a 100644
--- a/scripts/quarantine_zephyr.yaml
+++ b/scripts/quarantine_zephyr.yaml
@@ -439,6 +439,8 @@
     - drivers.gpio.build
     - sample.perf
     - .*secure_storage.*
+    - kernel.scheduler.simple_timeslicing
+    - kernel.scheduler.simple_no_timeslicing
   platforms:
     - nrf54h20dk@0.9.0/nrf54h20/cpuppr
   comment: "region RAM/FLASH overflowed"
diff --git a/west.yml b/west.yml
index 4ea9ae020834..6dd3e6c389c4 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: eb778e882c293b37176a316361e87c08b8386d93
+      revision: cb2537e877c693f40d9a24e800f1a5e6da133ca7
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above