Yes you should be able to, or with slightly more friendly software like gQRX or SDRSharp. It also looks like you can receive and decode the key signals using rtl_433[0] with option -R 64. Although it's a bit confusing looking at the source for the honda key rtl_433 decoder, as the author states it does not decrypt the rolling code.[1] According to the CVE there is no rolling code.

[0] https://github.com/merbanan/rtl_433

[1] https://github.com/merbanan/rtl_433/blob/master/src/devices/...

Yes. You can even listen to the warble of the codes. And those of my, well your, neighbors.

I did my own research (albeit not as far as this person) a couple years back and the 2018 CR-V is also vulnerable.

Maybe it's similar to the TPMS (tire pressure monitoring system) as talked about here: https://news.ycombinator.com/item?id=30619612

What you're looking for is RTL433[0].

[0]: https://github.com/merbanan/rtl_433