CVE-2021-21207: Debian Linux

High severity, CVSS 8.6. EPSS: 0.9% chance of exploitation in the next 30 days.

Use after free in IndexedDB in Google Chrome prior to 90.0.4430.72 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only
• Google Chrome: before 90.0.4430.72 (fixed in 90.0.4430.72)

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