CVE-2021-37973 Actively Exploited in the Wild
CVE-2021-37973 is a use after free vulnerability in Portals API, which is a web page navigation system that helps in page transitions, or what users see when they move between pages. The Portals API can help with this by streamlining the experience as users navigate across a website.
The flaw was discovered by Clément Lecigne of Google Threat Analysis Group (TAG). Due to the active exploitation, technical details about CVE-2021-37973 are scarce.
“Many of our security bugs are detected using AddressSanitizer, MemorySanitizer, UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL,” Google said.
To prevent your browser from being exploited by hackers, you should apply the update immediately.