I haven’t done adequate due diligence yet - could be inaccurate
I came across this article alleging that Germany is considering bailing on the F-35 aircraft because the US can remotely disable them.
If the US could do this to German F-35s, presumably they can do it to ours…
Additional reporting alleging concern in Canadian defence circles
That seems like just a rumour, I doubt anybody would have accepted it. The software is written exclusively in the US and proprietary, though, including every update.