diff --git a/debuggers/gdb/memviewdlg.h b/debuggers/gdb/memviewdlg.h
--- a/debuggers/gdb/memviewdlg.h
+++ b/debuggers/gdb/memviewdlg.h
@@ -51,6 +51,7 @@
         Q_OBJECT
     public:
         explicit MemoryViewerWidget(CppDebuggerPlugin* plugin, QWidget* parent = nullptr);
+        ~MemoryViewerWidget() override;
 
     public Q_SLOTS:
         /** Adds a new memory view. */
diff --git a/debuggers/gdb/memviewdlg.cpp b/debuggers/gdb/memviewdlg.cpp
--- a/debuggers/gdb/memviewdlg.cpp
+++ b/debuggers/gdb/memviewdlg.cpp
@@ -470,6 +470,11 @@
     slotAddMemoryView();
 }
 
+MemoryViewerWidget::~MemoryViewerWidget()
+{
+    qDeleteAll(m_memoryViews);
+}
+
 void MemoryViewerWidget::slotAddMemoryView()
 {
     MemoryView* widget = new MemoryView(this);