The vulnerability of Mozilla Firefox, Firefox ESR, and the email client Thunderbird relates to the use of memory after deallocation, allowing an attacker to cause a service failure.

The vulnerability of Mozilla Firefox, Firefox ESR, and the email client Thunderbird relates to the use of memory after it is freed, as a result of an update to the “marquee” object when window sizes are changed. Exploiting this vulnerability can allow a remote attacker to cause service...