diff --git a/Core/Screenshot.cpp b/Core/Screenshot.cpp
index 46694c35a1..2a2ddcf27c 100644
--- a/Core/Screenshot.cpp
+++ b/Core/Screenshot.cpp
@@ -237,26 +237,24 @@ static bool ConvertPixelTo8888RGBA(GPUDebugBufferFormat fmt, u8 &r, u8 &g, u8 &b
 }
 
 const u8 *ConvertBufferToScreenshot(const GPUDebugBuffer &buf, bool alpha, u8 *&temp, u32 &w, u32 &h) {
-	int pixelSize = alpha ? 4 : 3;
+	size_t pixelSize = alpha ? 4 : 3;
 	GPUDebugBufferFormat nativeFmt = alpha ? GPU_DBG_FORMAT_8888 : GPU_DBG_FORMAT_888_RGB;
 
 	w = std::min(w, buf.GetStride());
 	h = std::min(h, buf.GetHeight());
 
 	// The temp buffer will be freed by the caller if set, and can be the return value.
-	if (buf.GetFlipped() || buf.GetFormat() != nativeFmt) {
-		temp = new u8[pixelSize * w * h];
-	} else {
-		temp = nullptr;
-	}
+	temp = nullptr;
 
 	const u8 *buffer = buf.GetData();
 	if (buf.GetFlipped() && buf.GetFormat() == nativeFmt) {
+		temp = new u8[pixelSize * w * h];
 		// Silly OpenGL reads upside down, we flip to another buffer for simplicity.
 		for (u32 y = 0; y < h; y++) {
 			memcpy(temp + y * w * pixelSize, buffer + (buf.GetHeight() - y - 1) * buf.GetStride() * pixelSize, w * pixelSize);
 		}
 	} else if (buf.GetFormat() < GPU_DBG_FORMAT_FLOAT && buf.GetFormat() != nativeFmt) {
+		temp = new u8[pixelSize * w * h];
 		// Let's boil it down to how we need to interpret the bits.
 		int baseFmt = buf.GetFormat() & ~(GPU_DBG_FORMAT_REVERSE_FLAG | GPU_DBG_FORMAT_BRSWAP_FLAG);
 		bool rev = (buf.GetFormat() & GPU_DBG_FORMAT_REVERSE_FLAG) != 0;
@@ -284,6 +282,7 @@ const u8 *ConvertBufferToScreenshot(const GPUDebugBuffer &buf, bool alpha, u8 *&
 			}
 		}
 	} else if (buf.GetFormat() != nativeFmt) {
+		temp = new u8[pixelSize * w * h];
 		bool flip = buf.GetFlipped();
 
 		// This is pretty inefficient.
diff --git a/GPU/Common/GPUDebugInterface.h b/GPU/Common/GPUDebugInterface.h
index d02521be54..93c100e4fc 100644
--- a/GPU/Common/GPUDebugInterface.h
+++ b/GPU/Common/GPUDebugInterface.h
@@ -168,7 +168,7 @@ private:
 	u8 *data_ = nullptr;
 	u32 stride_ = 0;
 	u32 height_ = 0;
-	GPUDebugBufferFormat fmt_;
+	GPUDebugBufferFormat fmt_ = GPU_DBG_FORMAT_INVALID;
 	bool flipped_ = false;
 };
 
diff --git a/ext/native/thin3d/VulkanRenderManager.cpp b/ext/native/thin3d/VulkanRenderManager.cpp
index 5cd79d4dcb..2938590d67 100644
--- a/ext/native/thin3d/VulkanRenderManager.cpp
+++ b/ext/native/thin3d/VulkanRenderManager.cpp
@@ -156,7 +156,7 @@ void VulkanRenderManager::CreateBackbuffers() {
 	VkCommandBuffer cmdInit = GetInitCmd();
 
 	for (uint32_t i = 0; i < swapchainImageCount_; i++) {
-		SwapchainImageData sc_buffer;
+		SwapchainImageData sc_buffer{};
 		sc_buffer.image = swapchainImages[i];
 
 		VkImageViewCreateInfo color_image_view = { VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO };
diff --git a/ext/native/ui/ui_screen.h b/ext/native/ui/ui_screen.h
index c7090e23dd..c044e961a0 100644
--- a/ext/native/ui/ui_screen.h
+++ b/ext/native/ui/ui_screen.h
@@ -190,7 +190,7 @@ private:
 	std::string units_;
 	std::string negativeLabel_;
 	int *value_;
-	int sliderValue_;
+	int sliderValue_ = 0;
 	int minValue_;
 	int maxValue_;
 	int step_;
diff --git a/ext/native/ui/view.h b/ext/native/ui/view.h
index 7486ac4cd6..45d0538d44 100644
--- a/ext/native/ui/view.h
+++ b/ext/native/ui/view.h
@@ -580,7 +580,7 @@ private:
 	float paddingLeft_;
 	float paddingRight_;
 	int repeat_;
-	int repeatCode_;
+	int repeatCode_ = 0;
 };
 
 // Basic button that modifies a bitfield based on the pressed status. Supports multitouch.
diff --git a/ext/native/util/text/wrap_text.h b/ext/native/util/text/wrap_text.h
index 7418a8022e..61049bccef 100644
--- a/ext/native/util/text/wrap_text.h
+++ b/ext/native/util/text/wrap_text.h
@@ -31,7 +31,7 @@ protected:
 	// Position the current word starts at.
 	float x_ = 0.0f;
 	// Most recent width of word since last index.
-	float wordWidth_;
+	float wordWidth_ = 0.0f;
 	// Force the next word to cut partially and wrap.
 	bool forceEarlyWrap_ = false;
 };