Memory corruption in Mozilla Firefox
Priority MEDIUM 48CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.
Summary
Mozilla developers and community members reported memory safety bugs present in Firefox 62 and Firefox ESR 60.2. 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 < 63, Firefox ESR < 60.3, and Thunderbird < 60.3.
Why it matters now
EPSS 0.03207 88th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 63Firefox ESR (Mozilla): 60.3+1 more productRed Hat: 4 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Firefox | before 63 | 63 | Patch available | CNA |
| Mozilla | Firefox ESR | before 60.3 | 60.3 | Patch available | CNA |
| Mozilla | Thunderbird | before 60.3 | 60.3 | Patch available | CNA |
- Firefox VendorMozilla Affected before 63 Fixed in 63 Patch available CNA
- Firefox ESR VendorMozilla Affected before 60.3 Fixed in 60.3 Patch available CNA
- Thunderbird VendorMozilla Affected before 60.3 Fixed in 60.3 Patch available CNA
CPE configurations NVD · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 60.3.0; before 63.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 60.3.0 | Vulnerable | Mozilla |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* | 18.10 | Vulnerable | Canonical |
| cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 60.3.0; before 63.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 60.3.0 Vulnerable ·Mozilla
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Show 8 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* | 7.5 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 63
- Fix · CNA Firefox ESR (Mozilla) Fixed in 60.3
- Fix · CNA Thunderbird (Mozilla) Fixed in 60.3
Red Hat 4 advisories
- RHSA-2018:3532 Released 2018-11-09 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-60.3.0-1.el7_5
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-60.3.0-1.el7_5
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-60.3.0-1.el7_5
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) thunderbird-60.3.0-1.el7_5
- RHSA-2018:3531 Released 2018-11-09 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-60.3.0-1.el6
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-60.3.0-1.el6
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-60.3.0-1.el6
- RHSA-2018:3006 Released 2018-10-24 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Desktop (v. 6) firefox-60.3.0-1.el6
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-60.3.0-1.el6
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-60.3.0-1.el6
- Red Hat Enterprise Linux Server (v. 6) firefox-60.3.0-1.el6
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-60.3.0-1.el6
- Red Hat Enterprise Linux Workstation (v. 6) firefox-60.3.0-1.el6
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-60.3.0-1.el6
Show 1 more Red Hat advisories
- RHSA-2018:3005 Released 2018-10-24 · Red Hat rating Criticalfirefox security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) firefox-60.3.0-1.el7_5
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-60.3.0-1.el7_5
- Red Hat Enterprise Linux Server (v. 7) firefox-60.3.0-1.el7_5
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-60.3.0-1.el7_5
- Red Hat Enterprise Linux Workstation (v. 7) firefox-60.3.0-1.el7_5
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-60.3.0-1.el7_5
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) firefox-60.3.0-1.el7_5
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — USN-3801-1
12 records Highest priority Priority MEDIUM 4 MEDIUM, 8 LOW
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08888 Memory corruption in Mozilla FirefoxPriority MEDIUM 41
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2018:3005
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
Show 6 more groups
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2018:3006
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — GLSA-201811-04
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — DSA-4324
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2018:3531
4 records Highest priority Priority MEDIUM 4 MEDIUM
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2018:3532
4 records Highest priority Priority MEDIUM 4 MEDIUM
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — DSA-4337
4 records Highest priority Priority MEDIUM 4 MEDIUM
Other records, highest priority first
- TI-2018-08892 When manipulating user events in nested loops while opening a document through script, it…Priority MEDIUM 48
- TI-2018-08889 Memory corruption in Mozilla Firefox ESRPriority MEDIUM 43
- TI-2018-08893 Integer overflow in Mozilla FirefoxPriority MEDIUM 40
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2018:3005, RHSA-2018:3532 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2018:3005 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2018:3006, RHSA-2018:3531 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2018:3006 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2018:3006 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2018:3006 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2018:3005 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2018:3006, RHSA-2018:3531 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2018:3005, RHSA-2018:3532 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2018:3006, RHSA-2018:3531 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2018:3005, RHSA-2018:3532 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2018:3006 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2018:3005 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2018:3005 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) | Fixed | RHSA-2018:3532 |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2018-12390
- 2026-10-03 Alias added: GHSA-7vx2-3c54-4w62
References
Patch 4
- https://www.mozilla.org/security/advisories/mfsa2018-28/
- https://www.mozilla.org/security/advisories/mfsa2018-26/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1487098%2C1487660%2C1490234%2C1496159%2C1443748%2C1496340%2C1483905%2C1493347%2C1488803%2C1498701%2C1498482%2C1442010%2C1495245%2C1483699%2C1469486%2C1484905%2C1490561%2C1492524%2C1481844
- https://www.mozilla.org/security/advisories/mfsa2018-27/
More Mozilla Firefox vulnerabilities
- TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
- TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
- TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
- TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
- TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
- TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2018-12390 · CVE Program
- CVE-2018-12390 · NVD
- FIRST EPSS
- GHSA-7vx2-3c54-4w62 · GitHub Advisory Database · CC BY 4.0
- CVE-2018-12390 · Red Hat security data · CC BY 4.0
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