CVE-2018-12386
A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 13.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write. This leads to remote code execution inside the sandboxed content process when triggered. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- EPSS
- 13.52% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-704
- Affected
- redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · debian/debian linux · canonical/ubuntu linux · mozilla/firefox
- Source
- security@mozilla.org
EPSS 13.5% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/105460Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041770Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2881Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2884Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1493900Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://usn.ubuntu.com/3778-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4310Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-24/Vendor Advisory
- http://www.securityfocus.com/bid/105460Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041770Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2881Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2884Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1493900Exploit, Issue Tracking, Patch, Vendor Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://usn.ubuntu.com/3778-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4310Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-24/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.