Index: a/src/VBox/Devices/USB/linux/USBProxyDevice-linux.cpp
===================================================================
--- a/src/VBox/Devices/USB/linux/USBProxyDevice-linux.cpp
+++ a/src/VBox/Devices/USB/linux/USBProxyDevice-linux.cpp
@@ -90,7 +90,6 @@ typedef struct USBPROXYURBLNX
 # pragma GCC diagnostic push
 # pragma GCC diagnostic ignored "-Wpedantic"
 #endif
-    struct usbdevfs_urb             KUrb;
 #if RT_GNUC_PREREQ(6, 0)
 # pragma GCC diagnostic pop
 #endif
@@ -110,6 +109,7 @@ typedef struct USBPROXYURBLNX
     bool                            fDiscarded;
     /** Size to transfer in remaining fragments of a split URB */
     uint32_t                        cbSplitRemaining;
+    struct usbdevfs_urb             KUrb; /* This entry MUST be last */
 } USBPROXYURBLNX, *PUSBPROXYURBLNX;
 
 /**