I’m very interested in this also. The most recent info I’ve seen is that LLMs are, of course, great at discovering vulnerabilities, but not yet good at patching them.
Per Gemini, cited on this forum post:
While every engineering team would buy a magic button that instantly fixes vulnerable code, the reality is that generative AI is currently much better at breaking things than fixing them.
More details at the link.
But… that was 22 days ago. Things may have improved since then!