Related Vulnerabilities: CVE-2021-38496  

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash.

Severity High

Remote Yes

Type Arbitrary code execution

Description

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash.

AVG-2443 firefox 92.0.1-1 93.0-1 High Testing

https://www.mozilla.org/security/advisories/mfsa2021-43/
https://bugzilla.mozilla.org/show_bug.cgi?id=1725335