Google revealed on March 5th that last weeks patch for Chrome was really a fix for an active zero-day exploit.
The attacks were on a security flaw CVE-2019-5786, and the only patch included in the Chrome 72.0.3626.121 version, released last Friday, March 1, 2019.
You’ll want to make sure all of your PC’s and mobile devices with Google Chrome running on them are updated to at least the latest version 72.0.3626.121.
On a mobile device, go to your App store and make sure to update Google Chrome to the latest version.
On a PC or Mac, open Google Chrome and click the menu in the far right toolbar, scroll down to Help, and click on About Google Chrome. Chrome will automatically start to check for updates and download the lastest as necessary. If your version is updated, you will see a relaunch button to restart Chrome and apply the patch. CLICK IT.
If you’re on a Chromebook or Chromebox, perform the same procedure above for a PC or Mac, except you will see About Chrome OS and click on it. Since a Chromebook is built around the Chrome Browser, you will need to restart the device for the update to be applied.