Off-by-one read/write on the heap in Blink in Google Chrome prior to 62.0.3202.62 allowed a remote attacker to corrupt memory and possibly leak information and potentially execute code via a crafted PDF file.
https://www.debian.org/security/2017/dsa-4020
https://security.gentoo.org/glsa/201710-24
https://chromereleases.googleblog.com/2017/10/stable-channel-update-for-desktop.html