CVE-2021-29981

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 91 Thunderbird versions prior to 91

Description The issue is related to a problem in the JIT component of Firefox and Thunderbird, which could lead to a potentially exploitable crash due to register confusion failures in JITted code. This could allow a remote attacker to access confidential data, compromise its integrity, and cause a denial of service.

Recommendations For Firefox versions prior to 91, update to version 91 or later to resolve the issue. For Thunderbird versions prior to 91, update to version 91 or later to resolve the issue.