It sounds like someone finds a bug and had to make some noise about it to make the devs make some changes, but as they mention "The sky isn't falling", but is a nice discovery. That guy should get a bug bounty.

We must keep in mind that if the bug is that critic then the blockchain would stop working, i mean if that guy could take all the mempool then he should do it just to test his theory. But there are some white hacks who always do the right think and report the bug before the attack.