Chrome Apps in Google Chrome prior to 57.0.2987.98 for Linux, Windows, and Mac had a use after free bug in GuestView, which allowed a remote attacker to perform an out of bounds memory read via a crafted Chrome extension.
https://security.gentoo.org/glsa/201704-02
https://chromereleases.googleblog.com/2017/03/stable-channel-update-for-desktop.html
http://www.securityfocus.com/bid/96767