diff --git a/app/boards/native_sim_libfuzzer.conf b/app/boards/native_sim_libfuzzer.conf
index ece1e35845c9..ba17224424cf 100644
--- a/app/boards/native_sim_libfuzzer.conf
+++ b/app/boards/native_sim_libfuzzer.conf
@@ -5,6 +5,8 @@ CONFIG_ASSERT=y
 CONFIG_EXCEPTION_DEBUG=y
 CONFIG_ARCH_POSIX_TRAP_ON_FATAL=y
 CONFIG_SYS_HEAP_BIG_ONLY=y
+CONFIG_SYS_HEAP_HARDENING_EXTREME=y
+CONFIG_STACK_SENTINEL=y
 CONFIG_ZEPHYR_NATIVE_DRIVERS=y
 CONFIG_ARCH_POSIX_LIBFUZZER=y
 CONFIG_ZEPHYR_POSIX_FUZZ_TICKS=100