The bug reports are helpful! Many Linux developers including Linus, Greg Kroah-Hartman, Andrew Morton, Chris Mason, and Willy Tarreau have all commented positively on all the legitimate problems that are being found with LLM. Here is just one example article[1].
This is just a workflow issue. In the past it was very rare for multiple people to find and report a security vulnerability at once, so it made sense to keep the discussion private until they were ready to release a fix. With AI that is happening all the time, so it makes more sense for the discussion to be in public to avoid duplication. So they changed the policy accordingly. That is it.