A use after free in Blink in Google Chrome prior to 59.0.3071.104 for Mac, Windows, and Linux, and 59.0.3071.117 for Android, allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page, aka an IndexedDB sandbox escape.
https://security.gentoo.org/glsa/201706-20
https://chromereleases.googleblog.com/2017/06/stable-channel-update-for-desktop_15.html
https://access.redhat.com/errata/RHSA-2017:1495
http://www.securitytracker.com/id/1038765