CVE-2018-12406

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-02-28 · updated 2026-06-17
Weakness: CWE-119

Description

Mozilla developers and community members reported memory safety bugs present in Firefox 63. 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 < 64.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 18.10
Mozilla Firefox: before 64.0 — fixed in 64.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 64.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/106167
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1456947%2C1475669%2C1504816%2C1502886%2C1500064%2C1500310%2C1500696%2C1499198%2C1434490%2C1481745%2C1458129
https://usn.ubuntu.com/3844-1/
https://www.mozilla.org/security/advisories/mfsa2018-29/
http://www.securityfocus.com/bid/106167
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1456947%2C1475669%2C1504816%2C1502886%2C1500064%2C1500310%2C1500696%2C1499198%2C1434490%2C1481745%2C1458129
https://usn.ubuntu.com/3844-1/
https://www.mozilla.org/security/advisories/mfsa2018-29/

Get alerted when CVE-2018-12406 or the next vulnerability affects your stack