Attaching Yubikey USB device to VM causes Guest VM to Crash within Seconds

[OtterFlip]

Host OS: macOS 11.5.1 Guest OS: Ubuntu 20.04.2.0 x64 with Guest Additions installed VBox: 6.1.26

Within the Guest OS, when accessing a website that uses FIDO/U2F authentication with a Yubikey USB device, I attached the Yubikey to my host machine and then used the Devices | USB menu to pass through the Yubikey USB device to the Guest machine. The device worked properly and authentication with the website succeeded within the guest. However within a few seconds (perhaps 5 seconds) the guest VM process crashed and macOS displayed a "Problem Report for VirtualBox VM" dump report window with stack traces (see attachment). I repeated this three times and each time the crash occurred. On the third time, after successfully passing through and authenticating with the Yubikey USB device, I quickly accessed the Devices menu to detach the Yubikey USB device, which detachment appeared to succeed (the checkmark next to it was removed), however, again, a few seconds later the guest VM process crashed.

[OtterFlip]

VM crash dump file

[OtterFlip]

My apologies for the duplicate tickets. There is no feedback when you submit and so of course I smashed the submit button again (and again...lol). Um. My bad.

[galitsyn]

Hi OtterFlip, Could you please attach VBox.log?