CVE-2021-29976

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 90 Firefox ESR versions prior to 78.12 Thunderbird versions prior to 78.12

Description The issue is related to memory safety bugs present in code shared between Firefox and Thunderbird, which can lead to memory corruption. With sufficient effort, these bugs could potentially be exploited to run arbitrary code, allowing a remote attacker to access confidential data, compromise its integrity, and cause a denial of service.

Recommendations For Firefox versions prior to 90, update to version 90 or later. For Firefox ESR versions prior to 78.12, update to version 78.12 or later. For Thunderbird versions prior to 78.12, update to version 78.12 or later.