CVE-2021-21157: Fedoraproject Fedora

High severity, CVSS 8.8. EPSS: 9.5% chance of exploitation in the next 30 days.

Use after free in Web Sockets in Google Chrome on Linux prior to 88.0.4324.182 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Fedoraproject Fedora: version 32 only; version 33 only
• Google Chrome: before 88.0.4324.182 (fixed in 88.0.4324.182)
• Microsoft Edge: before 88.0.705.74 (fixed in 88.0.705.74)
• Microsoft Edge Chromium: before 88.0.4324.182 (fixed in 88.0.4324.182)

Published 2021-02-22. Last modified 2026-06-17.