More relevant quotes from the article:

> The group of hackers claims that their “Tesla Jailbreak” is “unpatchable” and allows to run “arbitrary software on the infotainment.”

And the full quote of what you put:

> Electrek’s Take

> Generally, these exploits are shared with Tesla, and it helps the automaker secure its systems.

> In this case, the hackers said that despite the exploit, they believe Tesla’s security is better than other automakers.

Doesn't seem like the security researchers actually shared the exploit with Tesla, at least as far as I understand.