Out-of-bounds read in Mozilla Firefox
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
Members of the <code>DEVMODEW</code> struct set by the printer device driver weren't being validated and could have resulted in invalid values which in turn would cause the browser to attempt out of bounds access to related variables.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mozilla | Firefox | before 110 | 110 | Patch available | CNA |
| Mozilla | Thunderbird | before 102.8 | 102.8 | Patch available | CNA |
| Mozilla | Firefox ESR | before 102.8 | 102.8 | Patch available | CNA |
- Firefox VendorMozilla Affected before 110 Fixed in 110 Patch available CNA
- Thunderbird VendorMozilla Affected before 102.8 Fixed in 102.8 Patch available CNA
- Firefox ESR VendorMozilla Affected before 102.8 Fixed in 102.8 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | before 110.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* | before 102.8 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* | before 102.8 | Vulnerable | Mozilla |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 110.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 102.8 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 102.8 Vulnerable ·Mozilla
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
- Fix · CNA Firefox (Mozilla) Fixed in 110
- Fix · CNA Thunderbird (Mozilla) Fixed in 102.8
- Fix · CNA Firefox ESR (Mozilla) Fixed in 102.8
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Mozilla Firefox 110
17 records Highest priority Priority HIGH 9 HIGH, 7 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2023-11012 Insufficiently protected credentials in Mozilla FirefoxPriority HIGH 73
- TI-2023-11011 Use after free in Mozilla FirefoxPriority HIGH 73
- TI-2023-11009 Incorrect type conversion in Mozilla FirefoxPriority HIGH 73
- Release ·
Mozilla Firefox ESR 102.8
14 records Highest priority Priority HIGH 7 HIGH, 6 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2023-11011 Use after free in Mozilla FirefoxPriority HIGH 73
- TI-2023-11009 Incorrect type conversion in Mozilla FirefoxPriority HIGH 73
- TI-2023-11007 Use after free in Mozilla FirefoxPriority HIGH 73
Show 1 more group
- Release ·
Mozilla Thunderbird 102.8
13 records Highest priority Priority HIGH 6 HIGH, 5 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2023-11011 Use after free in Mozilla FirefoxPriority HIGH 73
- TI-2023-11009 Incorrect type conversion in Mozilla FirefoxPriority HIGH 73
- TI-2023-11007 Use after free in Mozilla FirefoxPriority HIGH 73
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-25738
- 2026-10-03 Alias added: GHSA-5wxj-v52j-4fmh
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
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-2023-25738 · CVE Program
- CVE-2023-25738 · NVD
- FIRST EPSS
- GHSA-5wxj-v52j-4fmh · GitHub Advisory Database · CC BY 4.0
- CVE-2023-25738 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences