The issue in question has been identified as CVE-2022-1096, a “type confusion” in Chrome’s V8 JavaScript engine. It was identified by an anonymous security researcher who then alerted Google to it. Unfortunately, not much is known about the bug at this point in time, which we suppose is fair as we’re sure Google doesn’t want malicious actors to take advantage of it.
The details of the bug’s workings should eventually be revealed, but only after a majority of users have updated their browser and are protected from it. However, Google says that those details could still be restricted if it is later discovered that the same bug exists in third-party libraries that other projects rely on.
In any case, keeping your browser updated especially in terms of security and bug fixes is a good thing, so if you haven’t updated your browser yet, now might be a really good time to do so.