Related Vulnerabilities: CVE-2017-5438  

A use-after-free vulnerability has been found in Firefox < 53, during XSLT processing due to the result handler being held by a freed handler during handling. This results in a potentially exploitable crash.

Severity Medium

Remote Yes

Type Arbitrary code execution

Description

A use-after-free vulnerability has been found in Firefox < 53, during XSLT processing due to the result handler being held by a freed handler during handling. This results in a potentially exploitable crash.

AVG-249 firefox 52.0.2-1 53.0-1 Critical Fixed

21 Apr 2017 ASA-201704-6 AVG-249 firefox Critical multiple issues

https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/#CVE-2017-5438
https://bugzilla.mozilla.org/show_bug.cgi?id=1336828