Use after free in Mozilla Firefox
Priority MEDIUM 47CWE-416Published · 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-416 and the CVSS impact.
Summary
A use-after-free can occur when events are fired for a "FontFace" object after the object has been already been destroyed while working with fonts. This results in a potentially exploitable crash. This vulnerability affects Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52, and Thunderbird < 45.8.
Why it matters now
EPSS 0.02839 86th percentileScored 2026-11-07
Fix Fixed Firefox (Mozilla): 52Firefox ESR (Mozilla): 45.8+1 more productRed Hat: 3 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 52 | 52 | Patch available | CNA |
| Mozilla | Firefox ESR | before 45.8 | 45.8 | Patch available | CNA |
| Mozilla | Thunderbird | before 52; before 45.8 | 52, 45.8 | Patch available | CNA |
- Firefox VendorMozilla Affected before 52 Fixed in 52 Patch available CNA
- Firefox ESR VendorMozilla Affected before 45.8 Fixed in 45.8 Patch available CNA
- Thunderbird VendorMozilla Affected before 52; before 45.8 Fixed in 52, 45.8 Patch available CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Red Hat |
| 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:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Red Hat |
| 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:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
- 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
- cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:* Versions 5.0 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
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* | 7.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* | 7.4 | 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_workstation:5.0:*:*:*:*:*:*:* | 5.0 | 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:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 45.8.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 52.0; before 45.8.0 | Vulnerable | Mozilla |
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 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_workstation:5.0:*:*:*:*:*:*:* Versions 5.0 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
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 45.8.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 52.0; before 45.8.0 Vulnerable ·Mozilla
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 52
- Fix · CNA Firefox ESR (Mozilla) Fixed in 45.8
- Fix · CNA Thunderbird (Mozilla) Fixed in 52, 45.8
Red Hat 3 advisories
- RHSA-2017:0498 Released 2017-03-14 · Red Hat rating Importantthunderbird security update
- Red Hat Enterprise Linux Client (v. 7) thunderbird-45.8.0-1.el7_3
- Red Hat Enterprise Linux Desktop (v. 5 client) thunderbird-45.8.0-1.el5_11, thunderbird-45.8.0-1.el5_11.i386
- Red Hat Enterprise Linux Desktop (v. 6) thunderbird-45.8.0-1.el6_8
- Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird-45.8.0-1.el5_11, thunderbird-45.8.0-1.el5_11.i386
- Red Hat Enterprise Linux Server Optional (v. 6) thunderbird-45.8.0-1.el6_8
- Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-45.8.0-1.el7_3
- Red Hat Enterprise Linux Workstation (v. 6) thunderbird-45.8.0-1.el6_8
- Red Hat Enterprise Linux Workstation (v. 7) thunderbird-45.8.0-1.el7_3
- RHSA-2017:0459 Released 2017-03-08 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux (v. 5 server) firefox-45.8.0-2.el5_11, firefox-45.8.0-2.el5_11.i386
- Red Hat Enterprise Linux Desktop (v. 5 client) firefox-45.8.0-2.el5_11, firefox-45.8.0-2.el5_11.i386
- Red Hat Enterprise Linux Desktop (v. 6) firefox-45.8.0-2.el6_8
- Red Hat Enterprise Linux Desktop Optional (v. 6) firefox-45.8.0-2.el6_8
- Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox-45.8.0-2.el6_8
- Red Hat Enterprise Linux Server (v. 6) firefox-45.8.0-2.el6_8
- Red Hat Enterprise Linux Server Optional (v. 6) firefox-45.8.0-2.el6_8, firefox-45.8.0-2.el6_8.ppc
- Red Hat Enterprise Linux Workstation (v. 6) firefox-45.8.0-2.el6_8
- Red Hat Enterprise Linux Workstation Optional (v. 6) firefox-45.8.0-2.el6_8
- RHSA-2017:0461 Released 2017-03-08 · Red Hat rating Criticalfirefox security update
- Red Hat Enterprise Linux Client (v. 7) firefox-52.0-4.el7_3
- Red Hat Enterprise Linux Client Optional (v. 7) firefox-52.0-4.el7_3
- Red Hat Enterprise Linux Server (v. 7) firefox-52.0-4.el7_3
- Red Hat Enterprise Linux Server Optional (v. 7) firefox-52.0-4.el7_3, firefox-52.0-4.el7_3.ppc
- Red Hat Enterprise Linux Workstation (v. 7) firefox-52.0-4.el7_3
- Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-52.0-4.el7_3
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 — DSA-3832
17 records Highest priority Priority HIGH 1 HIGH, 11 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2017-03403 Memory corruption in Mozilla ThunderbirdPriority HIGH 67
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03424 Use after free in Mozilla ThunderbirdPriority MEDIUM 49
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2017:0459
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03438 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- TI-2017-03428 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
Show 5 more groups
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2017:0461
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03438 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- TI-2017-03428 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — RHSA-2017:0498
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03438 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- TI-2017-03428 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — GLSA-201705-06
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03438 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- TI-2017-03428 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — GLSA-201705-07
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03438 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- TI-2017-03428 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- Advisory ·
Mozilla Firefox, Firefox ESR, Thunderbird — DSA-3805
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2017-03432 Use after free in Mozilla FirefoxPriority MEDIUM 59
- TI-2017-03438 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
- TI-2017-03428 Memory corruption in Mozilla FirefoxPriority MEDIUM 48
Vendor assessments
Red Hat
Red Hat rating: Critical. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux (v. 5 server) | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2017:0461, RHSA-2017:0498 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2017:0461 |
| Red Hat Enterprise Linux Desktop (v. 5 client) | Fixed | RHSA-2017:0459, RHSA-2017:0498 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2017:0459, RHSA-2017:0498 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) | Fixed | RHSA-2017:0498 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2017:0461 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2017:0459, RHSA-2017:0498 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2017:0461, RHSA-2017:0498 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2017:0459, RHSA-2017:0498 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2017:0461, RHSA-2017:0498 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2017:0459 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2017:0461 |
Timeline
- 2026-10-02 Threatist record created from CVE-2017-5402
- 2026-10-03 Alias added: GHSA-9m53-4c27-h8f5
References
Advisory 11
- RHSA-2017:0459
- https://www.mozilla.org/security/advisories/mfsa2017-09/
- DSA-3832
- https://www.mozilla.org/security/advisories/mfsa2017-07/
- https://www.mozilla.org/security/advisories/mfsa2017-05/
- GLSA-201705-06
- RHSA-2017:0461
- DSA-3805
- https://www.mozilla.org/security/advisories/mfsa2017-06/
- RHSA-2017:0498
- GLSA-201705-07
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-2017-5402 · CVE Program
- CVE-2017-5402 · NVD
- FIRST EPSS
- GHSA-9m53-4c27-h8f5 · GitHub Advisory Database · CC BY 4.0
- CVE-2017-5402 · Red Hat security data · CC BY 4.0
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