The vulnerability in the `mozilla::nsTextNodeDirectionalityMap::RemoveElementFromMap` function of Mozilla browsers such as Firefox and Thunderbird’s email client allows a malicious actor to execute arbitrary code.

The vulnerability of the mozilla:: nsTextNodeDirectionalityMap::RemoveElementFromMap function in Mozilla Firefox, Firefox ESR, and the Thunderbird email client is related to the use of memory after it is freed. Exploiting this vulnerability allows a remote attacker to execute arbitrary code using...