CVE-2017-7819: Mozilla: Use-after-free while resizing images in design mode (MFSA 2017-22)

Severity: Critical

CVSS Score: 9.8

A use-after-free vulnerability can occur in design mode when image objects are resized if objects referenced during the resizing have been freed from memory. This results in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.