Insufficient data validation in V8 in Google Chrome prior to 90.0.4430.93 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
https://www.debian.org/security/2021/dsa-4911
https://security.gentoo.org/glsa/202104-08
https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.html