Last week one of our staff encountered an access violation error in WinTun. I think this happened while WireGuard was in the process of closing the device. A WireGuard log is attached. The machine is a Lenovo ThinkPad P53 laptop. I believe it was running WireGuard 0.3.11 and WinTun 0.10. It looks like the ReceivePacket syscall caught the exception and this resulted in a WireGuard panic at [1]. I wouldn't be surprised if this was a timing issue while the device was closing. I'm not too worried about it myself, but figured I should send it along in case it's of interest. This is the only occurrence I've seen. [1] https://github.com/WireGuard/wireguard-go/blob/0.0.20210424/tun/wintun/session_windows.go#L65 Joshua Sjoding SCJ Alliance IT Specialist www.scjalliance.com