Out of bounds write in JavaScript in Google Chrome prior to 73.0.3683.86 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
https://chromereleases.googleblog.com/2019/04/stable-channel-update-for-desktop_30.html
http://packetstormsecurity.com/files/156641/Google-Chrome-72-73-Array.map-Corruption.html