The first half off the video @fractalfreedom shared pretty much covered it. An analogy would be the Android bug allowed a hacker to hack your phone with SMS: https://thehackernews.com/2015/07/android-phone-hacking.html
You just send a specific kind of Tx to a node, then the node would crash. Any node that receive the message will crash. Since a crashed node won't be propagating the message anymore, the crash should stop there. So technically all the neighboring nodes of a miner should crash. The rest would be up for the blockchain rules. Alt-coins like Dash that use Bitcoin Core's code is also affected and they fixed everything few days ago: https://www.dash.org/forum/threads/dash-core-0-12-3-3-release-announcement.40698
The bug doesn't do any other harm than crashing nodes AFAIK. The attack should come from a miner. It's basically an invalid Tx. Each node that receive this type of Tx crash.
This was mitigated by the affected coins releasing a new version of their Core software with a fix.
Yep this is what i gathered. Thx for the answer!
Looks like it was a bit more complicated then we were first told according to the new info Ivan had today.
You are talking about the inflation bug, right? I didn't know Evan made a video about it.