Use after free in WebGL in Google Chrome prior to 91.0.4472.114 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective
https://security.gentoo.org/glsa/202107-06
https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop_17.html