REDHAT-BUG-2570664: Use After Free

Published Nov 10, 2026

Updated

Privilege escalation, sandbox escape due to use-after-free in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160.

Affected Software

0 affected components

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Firefox to a version that resolves this vulnerability.
Fixed in 160
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 153.7
Upgrade
Upgrade Thunderbird to a version that resolves this vulnerability.
Fixed in 160

Event History

Nov 10, 2026

Data Sourced

via Red Hat·08:14 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which product releases contain the fix?

The issue was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160.

What is the potential impact if this issue is exploited?

Successful exploitation could result in privilege escalation and escape from the sandbox.