diff --git a/Source/Core/DolphinQt/Config/GameConfigEdit.cpp b/Source/Core/DolphinQt/Config/GameConfigEdit.cpp
index be6587b009..705f3c6acc 100644
--- a/Source/Core/DolphinQt/Config/GameConfigEdit.cpp
+++ b/Source/Core/DolphinQt/Config/GameConfigEdit.cpp
@@ -63,7 +63,7 @@ GameConfigEdit::GameConfigEdit(QWidget* parent, const QString& path, bool read_o
 
   m_completer = new QCompleter(m_edit);
 
-  auto* completion_model = new QStringListModel;
+  auto* completion_model = new QStringListModel(m_completer);
   completion_model->setStringList(m_completions);
 
   m_completer->setModel(completion_model);
@@ -77,8 +77,6 @@ GameConfigEdit::GameConfigEdit(QWidget* parent, const QString& path, bool read_o
 
 void GameConfigEdit::CreateWidgets()
 {
-  m_menu = new QMenu;
-
   m_edit = new QTextEdit;
   m_edit->setReadOnly(m_read_only);
   m_edit->setAcceptRichText(false);
@@ -89,6 +87,8 @@ void GameConfigEdit::CreateWidgets()
 
   menu_button->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Fixed);
   menu_button->setText(tr("Presets"));
+
+  m_menu = new QMenu(menu_button);
   menu_button->setMenu(m_menu);
 
   layout->addWidget(menu_button);
diff --git a/Source/Core/DolphinQt/Config/InfoWidget.cpp b/Source/Core/DolphinQt/Config/InfoWidget.cpp
index faabe71747..7e165a33d8 100644
--- a/Source/Core/DolphinQt/Config/InfoWidget.cpp
+++ b/Source/Core/DolphinQt/Config/InfoWidget.cpp
@@ -104,7 +104,7 @@ QGroupBox* InfoWidget::CreateBannerDetails()
 
   m_name = CreateValueDisplay();
   m_maker = CreateValueDisplay();
-  m_description = new QTextEdit();
+  m_description = new QTextEdit(group);
   m_description->setReadOnly(true);
   CreateLanguageSelector();
 
@@ -153,7 +153,7 @@ void InfoWidget::SaveBanner()
 
 QLineEdit* InfoWidget::CreateValueDisplay(const QString& value)
 {
-  QLineEdit* value_display = new QLineEdit(value);
+  QLineEdit* value_display = new QLineEdit(value, this);
   value_display->setReadOnly(true);
   value_display->setCursorPosition(0);
   return value_display;
diff --git a/Source/Core/DolphinQt/GameList/GameList.cpp b/Source/Core/DolphinQt/GameList/GameList.cpp
index 50e2bd2991..27ebc2ef79 100644
--- a/Source/Core/DolphinQt/GameList/GameList.cpp
+++ b/Source/Core/DolphinQt/GameList/GameList.cpp
@@ -196,7 +196,7 @@ void GameList::MakeEmptyView()
                       "Double-click here to set a games directory..."));
   m_empty->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
 
-  auto event_filter = new DoubleClickEventFilter{};
+  auto event_filter = new DoubleClickEventFilter{m_empty};
   m_empty->installEventFilter(event_filter);
   connect(event_filter, &DoubleClickEventFilter::doubleClicked, [this] {
     auto current_dir = QDir::currentPath();
diff --git a/Source/Core/DolphinQt/MainWindow.cpp b/Source/Core/DolphinQt/MainWindow.cpp
index 022252e6d3..f4526ee49c 100644
--- a/Source/Core/DolphinQt/MainWindow.cpp
+++ b/Source/Core/DolphinQt/MainWindow.cpp
@@ -323,7 +323,7 @@ void MainWindow::InitCoreCallbacks()
 
 static void InstallHotkeyFilter(QWidget* dialog)
 {
-  auto* filter = new WindowActivationEventFilter();
+  auto* filter = new WindowActivationEventFilter(dialog);
   dialog->installEventFilter(filter);
 
   filter->connect(filter, &WindowActivationEventFilter::windowDeactivated,
diff --git a/Source/Core/DolphinQt/MenuBar.cpp b/Source/Core/DolphinQt/MenuBar.cpp
index 0c872c4aef..2ff5dfcc5c 100644
--- a/Source/Core/DolphinQt/MenuBar.cpp
+++ b/Source/Core/DolphinQt/MenuBar.cpp
@@ -271,7 +271,7 @@ void MenuBar::AddToolsMenu()
   m_perform_online_update_menu->addAction(tr("United States"), this,
                                           [this] { emit PerformOnlineUpdate("USA"); });
 
-  QMenu* menu = new QMenu(tr("Connect Wii Remotes"));
+  QMenu* menu = new QMenu(tr("Connect Wii Remotes"), tools_menu);
 
   tools_menu->addSeparator();
   tools_menu->addMenu(menu);
diff --git a/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.cpp b/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.cpp
index 993da44f62..7a9b8cf1de 100644
--- a/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.cpp
+++ b/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.cpp
@@ -6,6 +6,10 @@
 
 #include "DolphinQt/QtUtils/DoubleClickEventFilter.h"
 
+DoubleClickEventFilter::DoubleClickEventFilter(QObject* parent) : QObject(parent)
+{
+}
+
 bool DoubleClickEventFilter::eventFilter(QObject* object, QEvent* event)
 {
   if (event->type() == QEvent::MouseButtonDblClick)
diff --git a/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.h b/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.h
index 1e2da4a960..548262bd88 100644
--- a/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.h
+++ b/Source/Core/DolphinQt/QtUtils/DoubleClickEventFilter.h
@@ -9,6 +9,9 @@
 class DoubleClickEventFilter : public QObject
 {
   Q_OBJECT
+public:
+  explicit DoubleClickEventFilter(QObject* parent);
+
 signals:
   void doubleClicked();
 
diff --git a/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.cpp b/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.cpp
index 74907c46d6..a3819e24b4 100644
--- a/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.cpp
+++ b/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.cpp
@@ -7,6 +7,10 @@
 
 #include "DolphinQt/QtUtils/WindowActivationEventFilter.h"
 
+WindowActivationEventFilter::WindowActivationEventFilter(QObject* parent) : QObject(parent)
+{
+}
+
 bool WindowActivationEventFilter::eventFilter(QObject* object, QEvent* event)
 {
   if (event->type() == QEvent::WindowDeactivate)
diff --git a/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.h b/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.h
index c48e239540..49c467c8be 100644
--- a/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.h
+++ b/Source/Core/DolphinQt/QtUtils/WindowActivationEventFilter.h
@@ -9,6 +9,9 @@
 class WindowActivationEventFilter : public QObject
 {
   Q_OBJECT
+public:
+  explicit WindowActivationEventFilter(QObject* parent);
+
 signals:
   void windowActivated();
   void windowDeactivated();
diff --git a/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp b/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
index d1fa694fae..fe9e31dc21 100644
--- a/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
@@ -16,6 +16,7 @@
 #include "Common/Flag.h"
 #include "Common/Logging/Log.h"
 #include "Common/MathUtil.h"
+#include "Common/ScopeGuard.h"
 #include "Common/StringUtil.h"
 #include "Common/Thread.h"
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
@@ -40,10 +41,14 @@ static void HotplugThreadFunc()
   NOTICE_LOG(SERIALINTERFACE, "evdev hotplug thread started");
 
   udev* const udev = udev_new();
+  Common::ScopeGuard udev_guard([udev] { udev_unref(udev); });
+
   ASSERT_MSG(PAD, udev != nullptr, "Couldn't initialize libudev.");
 
   // Set up monitoring
   udev_monitor* const monitor = udev_monitor_new_from_netlink(udev, "udev");
+  Common::ScopeGuard monitor_guard([monitor] { udev_monitor_unref(monitor); });
+
   udev_monitor_filter_add_match_subsystem_devtype(monitor, "input", nullptr);
   udev_monitor_enable_receiving(monitor);
   const int monitor_fd = udev_monitor_get_fd(monitor);
@@ -61,11 +66,11 @@ static void HotplugThreadFunc()
     if (ret < 1 || !FD_ISSET(monitor_fd, &fds))
       continue;
 
-    std::unique_ptr<udev_device, decltype(&udev_device_unref)> dev{
-        udev_monitor_receive_device(monitor), udev_device_unref};
+    udev_device* const dev = udev_monitor_receive_device(monitor);
+    Common::ScopeGuard dev_guard([dev] { udev_device_unref(dev); });
 
-    const char* const action = udev_device_get_action(dev.get());
-    const char* const devnode = udev_device_get_devnode(dev.get());
+    const char* const action = udev_device_get_action(dev);
+    const char* const devnode = udev_device_get_devnode(dev);
     if (!devnode)
       continue;