Firstly, I am not going to say how to reproduce the crash, but notably most CSGO servers are affected, even servers without Sourcemod (I am sorry about the misconception earlier)
I am not sure if games like TF2, CSS etc are affected but the fix should work regardless minus the PTAH support.
If you have a CSGO server you can install PTAH for enhanced protection at an even earlier stage.
Optional requirements: PTAH (CSGO only)
Credits to these guys for helping track down the exploit:
Asherkin
Voided
Dr!fter
OfficialSikari for helping figure out how to replicate the issue.
Credits to
komashchenko for PTAH.
Thanks to
Kinsi for helping me test it.