An integer overflow on 32-bit systems in WebAssembly in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
https://www.exploit-db.com/exploits/44860/
https://www.debian.org/security/2018/dsa-4182
https://security.gentoo.org/glsa/201804-22
https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html