CVE-2021-43534

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 94 Thunderbird versions prior to 91.3 Firefox ESR versions prior to 91.3

Description The issue is related to a buffer overflow in memory, which could allow a remote attacker to execute arbitrary code. Memory safety bugs were found in Firefox 93 and Firefox ESR 91.2, showing evidence of memory corruption. It is presumed that these bugs could be exploited with enough effort.

Recommendations For Firefox versions prior to 94, update to version 94 or later. For Thunderbird versions prior to 91.3, update to version 91.3 or later. For Firefox ESR versions prior to 91.3, update to version 91.3 or later.