diff --git a/src/library_manager/lib_manager.c b/src/library_manager/lib_manager.c
index 4bd20a89a9c7..7d458b48982b 100644
--- a/src/library_manager/lib_manager.c
+++ b/src/library_manager/lib_manager.c
@@ -233,6 +233,9 @@ static void __sparse_cache *lib_manager_get_instance_bss_address(uint32_t module
 								 uint32_t instance_id,
 								 struct sof_man_module *mod)
 {
+	if (mod->type.load_type == SOF_MAN_MOD_TYPE_LLEXT)
+		return (void __sparse_cache *)mod->segment[SOF_MAN_SEGMENT_BSS].v_base_addr;
+
 	uint32_t instance_bss_size =
 		 mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length / mod->instance_max_count;
 	uint32_t inst_offset = instance_bss_size * PAGE_SZ * instance_id;
@@ -250,11 +253,15 @@ static void __sparse_cache *lib_manager_get_instance_bss_address(uint32_t module
 static int lib_manager_allocate_module_instance(uint32_t module_id, uint32_t instance_id,
 						uint32_t is_pages, struct sof_man_module *mod)
 {
-	size_t bss_size =
-			(mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length / mod->instance_max_count)
-			 * PAGE_SZ;
 	void __sparse_cache *va_base = lib_manager_get_instance_bss_address(module_id,
 									    instance_id, mod);
+	size_t bss_size;
+
+	if (mod->type.load_type == SOF_MAN_MOD_TYPE_LLEXT)
+		bss_size = mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length * PAGE_SZ;
+	else
+		bss_size = (mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length /
+			    mod->instance_max_count) * PAGE_SZ;
 
 	if ((is_pages * PAGE_SZ) > bss_size) {
 		tr_err(&lib_manager_tr,
@@ -275,12 +282,16 @@ static int lib_manager_allocate_module_instance(uint32_t module_id, uint32_t ins
 static int lib_manager_free_module_instance(uint32_t module_id, uint32_t instance_id,
 					    struct sof_man_module *mod)
 {
-	size_t bss_size =
-			(mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length / mod->instance_max_count)
-			 * PAGE_SZ;
+	size_t bss_size;
 	void __sparse_cache *va_base = lib_manager_get_instance_bss_address(module_id,
 									    instance_id, mod);
 
+	if (mod->type.load_type == SOF_MAN_MOD_TYPE_LLEXT)
+		bss_size = mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length * PAGE_SZ;
+	else
+		bss_size = (mod->segment[SOF_MAN_SEGMENT_BSS].flags.r.length /
+			    mod->instance_max_count) * PAGE_SZ;
+
 	/* Unmap bss memory. */
 	return lib_manager_align_unmap(va_base, bss_size);
 }