CVE-2020-26960

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 83 Firefox ESR versions prior to 78.5 Thunderbird versions prior to 78.5

Description The issue arises when the Compact() method is called on an nsTArray, potentially leading to the array being reallocated without updating other pointers. This can result in a use-after-free situation and an exploitable crash.

Recommendations For Firefox versions prior to 83, update to version 83 or later to resolve the issue. For Firefox ESR versions prior to 78.5, update to version 78.5 or later to resolve the issue. For Thunderbird versions prior to 78.5, update to version 78.5 or later to resolve the issue.