Millions of Google Chrome users issued with 24 hour deadline to update or delete browser by US government

Exploitation of the zero-day flaws in Chrome can allow a attacker to take control of your device. Since the vulnerabilities are related to memory, hackers can run their own code on your machine — destabilising the system, or enabling them to install malware and other malicious software to wreak havoc.

The warning issued to federal workers in the United States of America comes courtesy of the Cybersecurity and Infrastructure Security Agency, more commonly referred to as CISA. The government agency, which boasts an annual budget of $2.9 billion (£2.2bn), has mandated federal employees to “apply mitigations according to vendor guidance or discontinue use of the product if mitigations are not available.”

Of course, the deadline from CISA only applies to those working in US federal agencies — but it demonstrates the level of concern around these latest zero-day flaws and is good security practice for everyone to apply the latest patches.

The good news is the process should be pretty painless. Google has designed its Chrome browser to update automatically, with most security patches downloaded in the background. If an update is downloaded but not yet installed, you might find a warning at the top of the main menu stating “Relaunch to update”, “Finish update”, or “New Chrome available”.

You’ll need to relaunch Chrome to apply the latest security patches. This will involve closing the app — interrupting any in-progress downloads, messaging, or Incognito Mode windows.

Google will save any opened tabs and windows, reopening everything automatically when the updated Chrome browser restarts. However, due to the private nature of Incognito Mode tabs and windows, these will not reopen when Chrome restarts.

If you’re unable to close or relaunch Google Chrome at the moment, it’s possible to defer the restart by clicking “Not now”. The next time you restart your browser, the update will be applied. However, given the fast-approaching deadline from the US government agencies, it might be best not to delay these latest patches.

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If you’re unsure whether you’re running the latest version of the browser on your Windows or Mac, you can always manually check for updates to Google Chrome by clicking on the three-dot menu in the top right-hand corner of the browser. From there, open Settings > About Chrome.

If there’s an update ready to be downloaded and installed, Chrome will automatically start the process from this page. It will be applied next time you close the browser or restart your computer.