diff --git a/arch/posix/CMakeLists.txt b/arch/posix/CMakeLists.txt
index df88a9df85f..b32fc855117 100644
--- a/arch/posix/CMakeLists.txt
+++ b/arch/posix/CMakeLists.txt
@@ -27,6 +27,10 @@ if (CONFIG_ASAN)
   toolchain_cc_asan()
 endif ()
 
+if (CONFIG_UBSAN)
+  toolchain_cc_ubsan()
+endif ()
+
 zephyr_compile_definitions(_POSIX_C_SOURCE=200809 _XOPEN_SOURCE=600 _XOPEN_SOURCE_EXTENDED)
 
 zephyr_ld_options(
diff --git a/cmake/compiler/clang/target_sanitizers.cmake b/cmake/compiler/clang/target_sanitizers.cmake
index 9baa653e3f3..091b6d274d1 100644
--- a/cmake/compiler/clang/target_sanitizers.cmake
+++ b/cmake/compiler/clang/target_sanitizers.cmake
@@ -6,3 +6,10 @@ zephyr_compile_options(-fsanitize=address)
 zephyr_ld_options(-fsanitize=address)
 
 endmacro()
+
+macro(toolchain_cc_ubsan)
+
+zephyr_compile_options(-fsanitize=undefined)
+zephyr_ld_options(-fsanitize=undefined)
+
+endmacro()
diff --git a/cmake/compiler/gcc/target_sanitizers.cmake b/cmake/compiler/gcc/target_sanitizers.cmake
index c7273547987..1661307feb4 100644
--- a/cmake/compiler/gcc/target_sanitizers.cmake
+++ b/cmake/compiler/gcc/target_sanitizers.cmake
@@ -7,3 +7,10 @@ zephyr_link_libraries(-lasan)
 zephyr_ld_options(-fsanitize=address)
 
 endmacro()
+
+macro(toolchain_cc_ubsan)
+
+zephyr_compile_options(-fsanitize=undefined)
+zephyr_ld_options(-fsanitize=undefined)
+
+endmacro()
diff --git a/subsys/debug/Kconfig b/subsys/debug/Kconfig
index 27ce9fa9579..08a563c7e0d 100644
--- a/subsys/debug/Kconfig
+++ b/subsys/debug/Kconfig
@@ -45,14 +45,24 @@ config TRACING
 	help
 	  Enable system tracing. This requires a backend such as SEGGER
 	  Systemview to be enabled as well.
+
 config ASAN
 	bool "Build with address sanitizer"
 	depends on ARCH_POSIX
 	help
-	  Builds Zephyr with Address Sanitizer enabled.  This is currently
-	  only supported by the native_posix port, and requires a recent-ish
-	  compiler with the ``-fsanitize=address`` command line option, and
-	  the libasan library.
+	  Builds Zephyr with Address Sanitizer enabled. This is currently
+	  only supported by boards based on the posix architecture, and requires a
+	  recent-ish compiler with the ``-fsanitize=address`` command line option,
+	  and the libasan library.
+
+config UBSAN
+	bool "Build with undefined behavior sanitizer"
+	depends on ARCH_POSIX
+	help
+	  Builds Zephyr with Undefined Behavior Sanitizer enabled.
+	  This is currently only supported by boards based on the posix
+	  architecture, and requires a recent-ish compiler with the
+	  ``-fsanitize=undefined`` command line option.
 
 config STACK_USAGE
 	bool "Generate stack usage information"