A use after free in PDFium in Google Chrome prior to 61.0.3163.79 for Linux, Windows, and Mac allowed a remote attacker to potentially exploit memory corruption via a crafted PDF file.
https://security.gentoo.org/glsa/201709-15
https://chromereleases.googleblog.com/2017/09/stable-channel-update-for-desktop.html
https://access.redhat.com/errata/RHSA-2017:2676
http://www.securitytracker.com/id/1039291