CVE-2025-6424
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-06-24
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | From 60.9.0 (exc) |
| mozilla | firefox | From 60.9.0 (exc) |
| mozilla | firefox | From 60.9.0 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a use-after-free issue in the FontFaceSet component of Firefox. It can cause the browser to crash and may be exploitable by attackers to execute arbitrary code or cause denial of service.
How can this vulnerability impact me? :
If exploited, this vulnerability can lead to a crash of the Firefox browser and potentially allow attackers to execute arbitrary code, which could compromise the security and stability of your system.
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