To be honest, web browser architecture looks messy due to plug-in, Flash,etc. Google has released Chrome version 65.0.3325.146 for Windows, Mac, and Linux. This version addresses vulnerabilities that an attacker could exploit to obtain access to sensitive information. A design flaw looks strange. I speculate that Chrome browser shared previous Flash vulnerability.A memory write is not a necessity. The “use-after-free” type of exploits is that the threat actor duplicate the virtual function table in use. My comment similar NIST, it is strongly recommended upgrade your Chrome to version 65.0.3325.146. Otherwise it is a nightmare especially enterprise IT campus. Below url is the official announcement by Google.

https://chromereleases.googleblog.com/2018/03/stable-channel-update-for-desktop.html