Bad cast in DevTools in Google Chrome on Win, Linux, Mac, Chrome OS prior to 66.0.3359.117 allowed an attacker who convinced a user to install a malicious extension to perform an out of bounds memory read via a crafted Chrome Extension.
https://www.debian.org/security/2018/dsa-4256
https://security.gentoo.org/glsa/201808-01
https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html