CVE-2019-9821

firefox: use-after-free in AssertWorkerThread leading to crash

Loading…

Severity

Low

Red Hat Product Security

8.1

CVSS 3.0

Review impact separately from score.

Published · May 21, 2019

Updated · November 22, 2025

Description

A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 8.1
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-416 · Use After Free