Array bounds check failure in V8 in Google Chrome prior to 67.0.3396.62 allowed a remote attacker to perform an out of bounds memory read via a crafted PDF file.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-17905
https://chromereleases.googleblog.com/2018/05/stable-channel-update-for-desktop_58.html