CVE-2021-21222: Debian Linux

Medium severity, CVSS 6.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Heap buffer overflow in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker who had compromised the renderer process to bypass site isolation 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.