REDHAT-BUG-2550474: Use After Free

The issue was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.

The vulnerability affects the DOM Animation component and is classified as a use-after-free issue.

Published Oct 13, 2026

Updated

Use-after-free in the DOM: Animation component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.

Affected Software

2 affected components

Mozilla Firefox<158

Mozilla Firefox ESR<115.43, <153.5

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Firefox to a version that resolves this vulnerability.
Fixed in 158
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 115.43
Upgrade
Upgrade Firefox ESR to a version that resolves this vulnerability.
Fixed in 153.5

Oct 13, 2026

Data Sourced

via Red Hat·01:10 PM

DescriptionSeverityAffected Software

The issue was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.

The vulnerability affects the DOM Animation component and is classified as a use-after-free issue.