Off-by-one error in PDFium in Google Chrome prior to 67.0.3396.62 allowed a remote attacker to perform an out of bounds memory write via a crafted PDF file.
https://www.debian.org/security/2018/dsa-4237
https://chromereleases.googleblog.com/2018/05/stable-channel-update-for-desktop_58.html
https://access.redhat.com/errata/RHSA-2018:1815