Vulnerability/
REDHAT-BUG-2550434

REDHAT-BUG-2550434: Use After Free

Q: Which Red Hat advisories are associated with this issue?

The listed Red Hat advisories are RHSA-2026:89756, RHSA-2026:89757, and RHSA-2026:93443.

Published Oct 13, 2026

Updated

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

Affected Software

2 affected components

Mozilla Firefox<158

Mozilla Firefox ESR<153.5

Remediation

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 153.5

Event History

Oct 13, 2026

Data Sourced

via Red Hat·01:02 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which Red Hat advisories are associated with this issue?

The listed Red Hat advisories are RHSA-2026:89756, RHSA-2026:89757, and RHSA-2026:93443.

Company

Resources

Contact

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