CVE-2017-7749: Mozilla: Use-after-free during docshell reloading (MFSA 2017-16)

Severity: Critical

CVSS Score: 9.8

A use-after-free vulnerability when using an incorrect URL during the reloading of a docshell. This results in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.