diff --git a/arch/sim/Kconfig b/arch/sim/Kconfig
index ea2d9629b67..455abd4de3b 100644
--- a/arch/sim/Kconfig
+++ b/arch/sim/Kconfig
@@ -58,7 +58,7 @@ config SIM_CYGWIN_DECORATED
 		run:  It will crash early, probably in some function due to the failure to
 		allocate memory.
 
-config SIM_SANITIZE
+config SIM_ASAN
 	bool "Address Sanitizer"
 	default n
 	depends on MM_CUSTOMIZE_MANAGER
@@ -66,6 +66,13 @@ config SIM_SANITIZE
 		AddressSanitizer (ASan) is a fast compiler-based tool for detecting memory
 		bugs in native code.
 
+config SIM_UBSAN
+	bool "Undefined Behaviour Sanitizer"
+	default n
+	---help---
+		Compile-time instrumentation is used to detect various undefined behaviours
+		at runtime.
+
 choice
 	prompt "X64_64 ABI"
 	default SIM_X8664_SYSTEMV if HOST_LINUX
diff --git a/boards/sim/sim/sim/configs/asan/defconfig b/boards/sim/sim/sim/configs/asan/defconfig
index f656a298656..356ea01d603 100644
--- a/boards/sim/sim/sim/configs/asan/defconfig
+++ b/boards/sim/sim/sim/configs/asan/defconfig
@@ -26,7 +26,8 @@ CONFIG_READLINE_TABCOMPLETION=y
 CONFIG_SCHED_HAVE_PARENT=y
 CONFIG_SCHED_ONEXIT=y
 CONFIG_SCHED_WAITPID=y
-CONFIG_SIM_SANITIZE=y
+CONFIG_SIM_ASAN=y
+CONFIG_SIM_UBSAN=y
 CONFIG_SYSTEM_NSH=y
 CONFIG_TESTING_OSTEST=y
 CONFIG_USER_ENTRYPOINT="nsh_main"
diff --git a/boards/sim/sim/sim/scripts/Make.defs b/boards/sim/sim/sim/scripts/Make.defs
index 119d6a104ed..586ed241f16 100644
--- a/boards/sim/sim/sim/scripts/Make.defs
+++ b/boards/sim/sim/sim/scripts/Make.defs
@@ -129,14 +129,19 @@ ifeq ($(CONFIG_LIBCXX),y)
   endif
 endif
 
-ifeq ($(CONFIG_SIM_SANITIZE),y)
-  CFLAGS += -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer
-  CXXFLAGS += -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer
+ifeq ($(CONFIG_SIM_ASAN),y)
+  CFLAGS += -fsanitize=address -fno-omit-frame-pointer
+  CXXFLAGS += -fsanitize=address -fno-omit-frame-pointer
 else ifeq ($(CONFIG_MM_KASAN),y)
   CFLAGS += -fsanitize=kernel-address
   CXXFLAGS += -fsanitize=kernel-address
 endif
 
+ifeq ($(CONFIG_SIM_UBSAN),y)
+  CFLAGS += -fsanitize=undefined -fno-omit-frame-pointer
+  CXXFLAGS += -fsanitize=undefined -fno-omit-frame-pointer
+endif
+
 # Loadable module definitions
 
 CMODULEFLAGS = $(CFLAGS)
@@ -200,11 +205,16 @@ ifeq ($(CONFIG_SIM_M32),y)
   HOSTLDFLAGS += -m32
 endif
 
-ifeq ($(CONFIG_SIM_SANITIZE),y)
-  CCLINKFLAGS += -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer
+ifeq ($(CONFIG_SIM_ASAN),y)
+  CCLINKFLAGS += -fsanitize=address -fno-omit-frame-pointer
 else ifeq ($(CONFIG_MM_KASAN),y)
   CCLINKFLAGS += -fsanitize=kernel-address
 endif
 
+ifeq ($(CONFIG_SIM_UBSAN),y)
+  CCLINKFLAGS += -fsanitize=undefined -fno-omit-frame-pointer
+endif
+
+
 HOSTCFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
    $(ARCHCPUFLAGS) $(HOSTINCLUDES) $(EXTRAFLAGS) -D__SIM__ -pipe