CVE-2018-5186

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-10-18 · updated 2026-06-17
Weakness: CWE-119

Description

Memory safety bugs present in Firefox 60. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 61.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 17.10, 18.04
Mozilla Firefox: before 61.0 — fixed in 61.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 61.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/104557
http://www.securitytracker.com/id/1041193
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1464872%2C1463329%2C1419373%2C1412882%2C1413033%2C1444673%2C1454448%2C1453505%2C1438671
https://security.gentoo.org/glsa/201810-01
https://usn.ubuntu.com/3705-1/
https://www.mozilla.org/security/advisories/mfsa2018-15/
http://www.securityfocus.com/bid/104557
http://www.securitytracker.com/id/1041193
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1464872%2C1463329%2C1419373%2C1412882%2C1413033%2C1444673%2C1454448%2C1453505%2C1438671
https://security.gentoo.org/glsa/201810-01
https://usn.ubuntu.com/3705-1/
https://www.mozilla.org/security/advisories/mfsa2018-15/

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