An incorrect assumption about block structure in Blink in Google Chrome prior to 57.0.2987.133 for Mac, Windows, and Linux, and 57.0.2987.132 for Android, allowed a remote attacker to potentially exploit memory corruption via a crafted HTML page that triggers improper casting.
https://security.gentoo.org/glsa/201704-02
https://chromereleases.googleblog.com/2017/03/stable-channel-update-for-desktop_29.html