Use-after-free

Firefox is vulnerable to a potential use-after-free crash. The vulnerability is due to certain font styles when saving a page to PDF, which can cause a use-after-free condition. Attackers can exploit this vulnerability to execute arbitrary code or crash the application...

Mozilla: Use-after-free could occur when printing to PDF

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes this flaw as follows: When saving a page to PDF, certain font styles could have led to a potential use-after-free crash...