diff --git a/mm/Kconfig b/mm/Kconfig
index 2966d9f300..7c029878b1 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -69,6 +69,13 @@ config MM_DEFAULT_ALIGNMENT
 		memory default alignment is equal to sizoef(uintptr), if this value
 		is not 0, this value must be 2^n and at least sizeof(uintptr).
 
+config MM_NODE_GUARDSIZE
+	int "Memory node guard size"
+	default 0
+	---help---
+		After it is enabled, the front and rear nodes will maintain a safety
+		distance of at least CONFIG_MM_NODE_GUARDSIZE.
+
 config MM_SMALL
 	bool "Small memory model"
 	default n
diff --git a/mm/mm_heap/mm.h b/mm/mm_heap/mm.h
index 58d432716f..0a818b06dd 100644
--- a/mm/mm_heap/mm.h
+++ b/mm/mm_heap/mm.h
@@ -143,7 +143,8 @@
  * previous freenode
  */
 
-#define MM_ALLOCNODE_OVERHEAD (MM_SIZEOF_ALLOCNODE - sizeof(mmsize_t))
+#define MM_ALLOCNODE_OVERHEAD (CONFIG_MM_NODE_GUARDSIZE + \
+                               MM_SIZEOF_ALLOCNODE - sizeof(mmsize_t))
 
 /* Get the node size */
 
diff --git a/mm/mm_heap/mm_realloc.c b/mm/mm_heap/mm_realloc.c
index d41619a66a..6600290f58 100644
--- a/mm/mm_heap/mm_realloc.c
+++ b/mm/mm_heap/mm_realloc.c
@@ -153,7 +153,8 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
           heap->mm_curused += newsize - oldsize;
           mm_shrinkchunk(heap, oldnode, newsize);
           kasan_poison((FAR char *)oldnode + MM_SIZEOF_NODE(oldnode) +
-                       sizeof(mmsize_t), oldsize - MM_SIZEOF_NODE(oldnode));
+                       sizeof(mmsize_t) - CONFIG_MM_NODE_GUARDSIZE,
+                       oldsize - MM_SIZEOF_NODE(oldnode));
         }
 
       /* Then return the original address */