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CVE-2018-5103

critical

Description

A use-after-free vulnerability can occur during mouse event handling due to issues with multiprocess support. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.

References

https://www.debian.org/security/2018/dsa-4102

https://www.debian.org/security/2018/dsa-4096

https://usn.ubuntu.com/3544-1/

https://lists.debian.org/debian-lts-announce/2018/01/msg00036.html

https://lists.debian.org/debian-lts-announce/2018/01/msg00030.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1423159

https://access.redhat.com/errata/RHSA-2018:0262

https://access.redhat.com/errata/RHSA-2018:0122

http://www.securitytracker.com/id/1040270

http://www.securityfocus.com/bid/102783

https://www.mozilla.org/security/advisories/mfsa2018-04/

https://www.mozilla.org/security/advisories/mfsa2018-03/

https://www.mozilla.org/security/advisories/mfsa2018-02/

https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-16889

Details

Source: Mitre, NVD

Published: 2018-06-11

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.02704