Stop blaming the reporter. Start asking kernel to fix their process. Linux kernel is no longer a toy project, it has full time employees employed by various companies. They should have handled notifying distributions. Not some rando.
No, I will. The distros and the kernel devs should be talking and moving on high sev patches, sure. But real people will have gotten hurt because the reporter didn't want to wait for that to happen. That's on them.
It's one thing to report a vulnerability, another entirely to make a crazy exploit available for any tom, dick, and harry to take and use. It was irresponsible of whoever came up with it to release it in the world without first giving major distros a head's up.