[Bug]: VirtualBoxVM segfault in DarwinHidDevicesApplyAndReleaseLedsState after host USB KVM switch (macOS, 7.2.22) #965

Version

7.2.22

Host OS Type

macOS

Host OS name + version

Mac Tahoe Version 26.6.2 (25G83)

Host Architecture

ARM

Guest OS Type

macOS

Guest Architecture

ARM

Guest OS name + version

Ubuntu 26.10

Component

Unspecified

What happened?

I have a KVM switch (AV Access iDock C20) to switch between two Mac Book Pro M4 laptops. I'm running VirtualBox only on Mac #1. I switch back-and-forth between the Macs during the day. When I do that, VirtualBox crashes.

Primary error:
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
Termination Reason: Namespace SIGNAL, Code 11, Segmentation fault: 11

Environment:

• VirtualBox 7.2.22 r175245, darwin.arm64 release, running in driverless mode
• Host: Mac16,5 (M4 Max, 16 cores, 128 GB), macOS 26.6.2 (25G83)
• Guest: Ubuntu 26.10 (arm64), 16 vCPUs, Guest Additions 6.0.0 reported by guest

How can we reproduce this?

Steps:

1. Run a VM with the GUI. Keyboard and mouse are connected through a USB KVM
   switch shared with another Mac.
2. Switch the KVM to the other Mac, then switch back.
3. Click between the VirtualBox window and other apps.

Result: VirtualBoxVM crashes with EXC_BAD_ACCESS (SIGSEGV), KERN_INVALID_ADDRESS
at 0x0 on the main thread. Crashing stack:
0 IOKit IOHIDDeviceCopyMatchingElements + 44
1 UICommon.dylib
2 UICommon.dylib DarwinHidDevicesApplyAndReleaseLedsState + 512
3 VirtualBoxVM
4 QtCore ... QApplicationPrivate::notify_helper / setActiveWindow
...
QCocoaWindow::windowDidBecomeKey (crash 1) and windowDidResignKey (crash 2)

Did you upload all of your necessary log files, screenshots, etc.?

• Yes, I've uploaded all pertinent files to this issue.