CVE-2021-30527: Fedoraproject Fedora

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

Use after free in WebUI in Google Chrome prior to 91.0.4472.77 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Google Chrome: before 91.0.4472.77 (fixed in 91.0.4472.77)

Published 2021-06-07. Last modified 2026-06-17.