CVE-2021-29968: Mozilla Firefox

High severity, CVSS 8.1. EPSS: 0.8% chance of exploitation in the next 30 days.

When drawing text onto a canvas with WebRender disabled, an out of bounds read could occur. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.0.1.

Affected products

• Mozilla Firefox: before 89.0.1 (fixed in 89.0.1)

Published 2021-06-24. Last modified 2026-06-17.