CVE-2021-21223: Debian Linux

Critical severity, CVSS 9.6. EPSS: 1.4% chance of exploitation in the next 30 days.

Integer overflow in Mojo in Google Chrome prior to 90.0.4430.85 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only
• Google Chrome: before 90.0.4430.85 (fixed in 90.0.4430.85)

Published 2021-04-26. Last modified 2026-06-17.