As other replies to you have touched on, I believe you’ve misread/misunderstood that, although I understand why. It definitely could’ve been worded more clearly.

What it means is more along the lines of:

This seemingly was a mistake. Linux’s second-in-command Greg Kroah-Hartman responded to each report asking about their submission to the public mailing list.

He’s not the one that submitted them. He’s the one that replied to them asking “wtf!?”