diff --git a/editor/editor_help.cpp b/editor/editor_help.cpp
index 29417709a3f..17105606df0 100644
--- a/editor/editor_help.cpp
+++ b/editor/editor_help.cpp
@@ -294,7 +294,6 @@ EditorHelpSearch::EditorHelpSearch() {
 	VBoxContainer *vbc = memnew(VBoxContainer);
 	add_child(vbc);
 
-	HBoxContainer *sb_hb = memnew(HBoxContainer);
 	search_box = memnew(LineEdit);
 	vbc->add_child(search_box);
 	search_box->connect("text_changed", this, "_text_changed");
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index 8cc1bb9b07d..06e98605529 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -5484,6 +5484,7 @@ EditorNode::~EditorNode() {
 	memdelete(editor_plugins_over);
 	memdelete(editor_plugins_force_input_forwarding);
 	memdelete(file_server);
+	memdelete(progress_hb);
 	EditorSettings::destroy();
 }
 
diff --git a/editor/editor_settings.cpp b/editor/editor_settings.cpp
index 5b73d836910..fe41e83bcbf 100644
--- a/editor/editor_settings.cpp
+++ b/editor/editor_settings.cpp
@@ -260,6 +260,7 @@ static void _create_script_templates(const String &p_path) {
 		}
 	}
 
+	memdelete(dir);
 	memdelete(file);
 }
 
@@ -286,6 +287,7 @@ void EditorSettings::create() {
 		self_contained = true;
 		extra_config->load(exe_path + "/_sc_");
 	}
+	memdelete(d);
 
 	if (self_contained) {
 		// editor is self contained
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index 0dcabb1776b..34c0a0595e8 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -4102,3 +4102,7 @@ CanvasItemEditorViewport::CanvasItemEditorViewport(EditorNode *p_node, CanvasIte
 	label_desc->hide();
 	editor->get_gui_base()->add_child(label_desc);
 }
+
+CanvasItemEditorViewport::~CanvasItemEditorViewport() {
+	memdelete(preview);
+}
diff --git a/editor/plugins/canvas_item_editor_plugin.h b/editor/plugins/canvas_item_editor_plugin.h
index 9b027fda605..0291660d424 100644
--- a/editor/plugins/canvas_item_editor_plugin.h
+++ b/editor/plugins/canvas_item_editor_plugin.h
@@ -512,6 +512,7 @@ public:
 	virtual void drop_data(const Point2 &p_point, const Variant &p_data);
 
 	CanvasItemEditorViewport(EditorNode *p_node, CanvasItemEditor *p_canvas);
+	~CanvasItemEditorViewport();
 };
 
 #endif
diff --git a/editor/script_create_dialog.cpp b/editor/script_create_dialog.cpp
index 299538a2b3e..b70c63c97c5 100644
--- a/editor/script_create_dialog.cpp
+++ b/editor/script_create_dialog.cpp
@@ -591,6 +591,9 @@ ScriptCreateDialog::ScriptCreateDialog() {
 	hb->add_child(vb);
 	hb->add_child(empty_v->duplicate());
 
+	memdelete(empty_h);
+	memdelete(empty_v);
+
 	add_child(hb);
 
 	/* Language */
diff --git a/platform/x11/os_x11.cpp b/platform/x11/os_x11.cpp
index dbc3914410f..008b3ab6155 100644
--- a/platform/x11/os_x11.cpp
+++ b/platform/x11/os_x11.cpp
@@ -538,6 +538,8 @@ void OS_X11::finalize() {
 	physics_2d_server->finish();
 	memdelete(physics_2d_server);
 
+	memdelete(power_manager);
+
 	if (xrandr_handle)
 		dlclose(xrandr_handle);