A use after free in PDFium in Google Chrome prior to 57.0.2987.98 for Mac, Windows, and Linux and 57.0.2987.108 for Android allowed a remote attacker to have an unspecified impact via a crafted PDF file.
http://rhn.redhat.com/errata/RHSA-2017-0499.html
https://chromereleases.googleblog.com/2017/03/stable-channel-update-for-desktop.html