diff --git a/core/io/packet_peer.cpp b/core/io/packet_peer.cpp
index 48806fba7306..0329ace31305 100644
--- a/core/io/packet_peer.cpp
+++ b/core/io/packet_peer.cpp
@@ -318,9 +318,9 @@ int PacketPeerStream::get_output_buffer_max_size() const {
 }
 
 PacketPeerStream::PacketPeerStream() {
-	int rbsize = GLOBAL_GET("network/limits/packet_peer_stream/max_buffer_po2");
+	int64_t rbsize = GLOBAL_GET("network/limits/packet_peer_stream/max_buffer_po2");
 
 	ring_buffer.resize(rbsize);
-	input_buffer.resize(1 << rbsize);
-	output_buffer.resize(1 << rbsize);
+	input_buffer.resize(int64_t(1) << rbsize);
+	output_buffer.resize(int64_t(1) << rbsize);
 }
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs
index d5d9404ed1bc..c806263edb57 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/NativeInterop/InteropStructs.cs
@@ -474,7 +474,7 @@ public readonly IntPtr Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != IntPtr.Zero ? *((int*)_ptr - 1) : 0;
+            get => _ptr != IntPtr.Zero ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -725,7 +725,7 @@ private struct VariantVector
             public readonly unsafe int Size
             {
                 [MethodImpl(MethodImplOptions.AggressiveInlining)]
-                get => _ptr != null ? *((int*)_ptr - 1) : 0;
+                get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
             }
         }
 
@@ -875,7 +875,7 @@ public readonly unsafe byte* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -939,7 +939,7 @@ public readonly unsafe long* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -971,7 +971,7 @@ public readonly unsafe float* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -1003,7 +1003,7 @@ public readonly unsafe double* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -1035,7 +1035,7 @@ public readonly unsafe godot_string* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -1067,7 +1067,7 @@ public readonly unsafe Vector2* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -1099,7 +1099,7 @@ public readonly unsafe Vector3* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
@@ -1131,7 +1131,7 @@ public readonly unsafe Color* Buffer
         public readonly unsafe int Size
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => _ptr != null ? *((int*)_ptr - 1) : 0;
+            get => _ptr != null ? (int)(*((ulong*)_ptr - 1)) : 0;
         }
     }
 
diff --git a/servers/rendering/renderer_rd/storage_rd/light_storage.cpp b/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
index 21c6425a8783..150e82c25c5b 100644
--- a/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/light_storage.cpp
@@ -1988,7 +1988,7 @@ void LightStorage::shadow_atlas_set_size(RID p_atlas, int p_size, bool p_16_bits
 	for (int i = 0; i < 4; i++) {
 		//clear subdivisions
 		shadow_atlas->quadrants[i].shadows.clear();
-		shadow_atlas->quadrants[i].shadows.resize(1 << shadow_atlas->quadrants[i].subdivision);
+		shadow_atlas->quadrants[i].shadows.resize(int64_t(1) << int64_t(shadow_atlas->quadrants[i].subdivision));
 	}
 
 	//erase shadow atlas reference from lights