Related Vulnerabilities: CVE-2021-23979  

A security issue was found in Firefox before version 86.0. Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and Mozilla presumes that with enough effort some of these could have been exploited to run arbitrary code.

Severity High

Remote Yes

Type Arbitrary code execution

Description

A security issue was found in Firefox before version 86.0. Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and Mozilla presumes that with enough effort some of these could have been exploited to run arbitrary code.

AVG-1599 firefox 85.0.2-1 86.0-1 High Fixed

https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23979
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1663222%2C1666607%2C1672120%2C1678463%2C1678927%2C1679560%2C1681297%2C1681684%2C1683490%2C1684377%2C1684902