CVE-2018-12376: canonical ubuntu_linux
Vulnerability summary
CVE-2018-12376 is a critical (CVSS 9.8) vulnerability in canonical ubuntu_linux. EPSS estimates a 3.15% chance of exploitation in the next 30 days, higher than 87.9% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 3% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 18 · Related 10Timeline
- 18-10-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
Memory safety bugs present in Firefox 61 and Firefox ESR 60.1. 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 < 62, Firefox ESR < 60.2, and Thunderbird < 60.2.1.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.15%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.15% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat6 products
- enterprise_linux_desktop6.0 | 7.0
- enterprise_linux_server6.0 | 7.0
- enterprise_linux_server_aus7.6
- enterprise_linux_server_eus7.5 | 7.6
- enterprise_linux_server_tus7.6
Ubuntu4 products
- firefox< 62.0+build2-0ubuntu0.14.04.3 | < 62.0+build2-0ubuntu0.16.04.3 | < 62.0+build2-0ubuntu0.18.04.3
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- thunderbird< 1:60.2.1+build1-0ubuntu0.14.04.2 | < 1:60.2.1+build1-0ubuntu0.16.04.4 | < 1:60.2.1+build1-0ubuntu0.18.04.2
Debian3 products
- firefox-esr< 60.2.0esr-1
- thunderbird< 1:60.2.1-1
- debian_linuxEOL8.0 | 9.0
Mozilla3 products
- firefox≥ unspecified, < 62 | < 60.2.0 | < 62.0
- firefox esr≥ unspecified, < 60.2
- thunderbird≥ unspecified, < 60.2.1 | < 60.2.1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
5 vendors · 17 products
References
25 links
lists.debian.org/debian-lts-announce/2018/11/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory