CVE-2021-21148: Google Chromium V8 Heap Buffer Overflow Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 20% chance of exploitation in the next 30 days.

Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only
• Google Chrome: before 88.0.4324.150 (fixed in 88.0.4324.150)

Published 2021-02-09. Last modified 2026-06-17.