Incorrect object lifecycle handling in PDFium in Google Chrome prior to 71.0.3578.98 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file.
https://www.debian.org/security/2019/dsa-4395
https://www.debian.org/security/2018/dsa-4352
https://security.gentoo.org/glsa/201908-18
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop_12.html
https://chromereleases.googleblog.com/2018/12/stable-channel-update-for-desktop.html