diff --git a/lib/env_dpdk/memory.c b/lib/env_dpdk/memory.c
index 8bf2f9817..db0ce9216 100644
--- a/lib/env_dpdk/memory.c
+++ b/lib/env_dpdk/memory.c
@@ -360,6 +360,10 @@ spdk_mem_map_get_map_1gb(struct spdk_mem_map *map, uint64_t vfn_2mb)
 	uint64_t idx_256tb = MAP_256TB_IDX(vfn_2mb);
 	size_t i;
 
+	if (spdk_unlikely(idx_256tb >= SPDK_COUNTOF(map->map_256tb.map))) {
+		return NULL;
+	}
+
 	map_1gb = map->map_256tb.map[idx_256tb];
 
 	if (!map_1gb) {
diff --git a/test/env/memory/memory_ut.c b/test/env/memory/memory_ut.c
index 2ae12c3c7..d1cf58eec 100644
--- a/test/env/memory/memory_ut.c
+++ b/test/env/memory/memory_ut.c
@@ -193,6 +193,10 @@ test_mem_map_translation(void)
 	rc = spdk_mem_map_set_translation(map, 0x1000000000000ULL, VALUE_2MB, 0x5678);
 	CU_ASSERT(rc == -EINVAL);
 
+	/* Attempt to set translation starting at a valid address but exceeding the valid range */
+	rc = spdk_mem_map_set_translation(map, 0xffffffe00000ULL, VALUE_2MB * 2, 0x123123);
+	CU_ASSERT(rc != 0);
+
 	spdk_mem_map_free(&map);
 	CU_ASSERT(map == NULL);
 }