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Epic CEO Tim Sweeney explains the Fortnite bug that Google leaked.

It’s known as a man-in-the-disk vulnerability, it’s complicated, but the idea is if a user downloaded Fortnite from the Samsung Galaxy Store, then went somewhere else and installed malware from a webpage, that malware could modify some of the files Fortnite had installed and use that to escalate its privileges to become more malware-y.

He says the bug was only ever on the Samsung Galaxy version of Fortnite, was fixed within two days, and says he’s unaware if anyone was ever harmed by the vulnerability.