A use-after-free vulnerability can occur in the compositor during certain graphics operations when a raw pointer is used instead of a reference counted one. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.7.3 and Firefox < 59.0.2.
http://www.securityfocus.com/bid/103506
http://www.securitytracker.com/id/1040574
https://access.redhat.com/errata/RHSA-2018:1098
https://access.redhat.com/errata/RHSA-2018:1099
https://bugzilla.mozilla.org/show_bug.cgi?id=1440717
https://lists.debian.org/debian-lts-announce/2018/03/msg00023.html
https://usn.ubuntu.com/3609-1/
Source: MITRE
Published: 2018-06-11
Updated: 2018-08-09
Type: CWE-416
Base Score: 7.5
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 10
Severity: HIGH
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 3.9
Severity: CRITICAL