The thread that the title comes from is from a Twitter user that later stated about the issue: "And YES: I LOVE hyping the sh1t out of this stuff because apparently sensationalism is the only language that forces these people to fix. "
As such, every single thing about the topic should be taken with a grain of salt. Starting with systems affected (it's not all GNU/Linux) and also CVSS score (I score it as a 6.3 instead of 9.9). Use your imagination to decide how much of what was posted is based on fact as opposed to fantasy.
For starters, only systems without an enabled firewall are exploitable. (Note: Ubuntu doesn't enable a firewall by default for reasons I cannot fathom).
Secondly, the attack requires the victim to take a specific implausible action for the attack to work.
There's really nothing to see here. Spending your time thinking about any other vulnerability or attack vector would be a much better use of your time.