Out of bounds read and write in PDFium in Google Chrome prior to 81.0.4044.122 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file.
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1044
https://www.debian.org/security/2020/dsa-4714
https://chromereleases.googleblog.com/2020/04/stable-channel-update-for-desktop_21.html