CVE-2018-12377
A use-after-free vulnerability can occur when refresh driver timers are refreshed in some circumstances during shutdown when the timer is deleted while still in use.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A use-after-free vulnerability can occur when refresh driver timers are refreshed in some circumstances during shutdown when the timer is deleted while still in use. This results in a potentially exploitable crash. This vulnerability affects Firefox < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.36% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- 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 · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 3.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/105280Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041610Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2692Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2693Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3403Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3458Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1470260Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3761-1/Third Party Advisory
- https://usn.ubuntu.com/3793-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4287Third Party Advisory
- https://www.debian.org/security/2018/dsa-4327Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-20/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-25/Vendor Advisory
- http://www.securityfocus.com/bid/105280Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041610Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2692Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2693Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3403Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3458Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1470260Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/201810-01Third Party Advisory
- https://security.gentoo.org/glsa/201811-13Third Party Advisory
- https://usn.ubuntu.com/3761-1/Third Party Advisory
- https://usn.ubuntu.com/3793-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4287Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.