Google released Chrome version 91.0.4472.114 for Windows, Mac, and Linux. The patch notes for this version can be viewed at Chrome Release Note.
This update addresses vulnerabilities that an attacker could exploit to take control of an unpatched system. Google is aware that exploits of CVE-2021-30551 and CVE-2021-30554 exist in the wild.
The ACSC is highlighting this reporting to ensure Australian individuals and organisations are informed about the current global threat environment, and are equipped to take proactive measures to improve your organisation’s cyber security posture.
ACSC encourages users and administrators to review the Chrome Release Note and apply the necessary updates. ACSC encourages partners to report any sightings to asd.assist@defence.gov.au
Normally updates happen in the background when you close and reopen your computer's browser. But if you haven't closed your browser in a while, you might see a pending update:
To update Google Chrome:
The browser saves your opened tabs and windows and reopens them automatically when it restarts. Your Incognito windows won't reopen when Chrome restarts. If you'd prefer not to restart right away, click Not now. The next time you restart your browser, the update will be applied.