Execution of user supplied Javascript during object deserialization can update object length leading to an out of bounds write in V8 in Google Chrome prior to 71.0.3578.80 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
https://access.redhat.com/errata/RHSA-2018:3803
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html