CVE-2025-14321
BaseFortify
Publication date: 2025-12-09
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | to 140.6.0 (exc) |
| mozilla | firefox | to 146.0 (exc) |
| mozilla | thunderbird | to 140.6.0 (exc) |
| mozilla | thunderbird | to 146.0 (exc) |
Helpful Resources
Exploitability
| 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should update Firefox to version 146 or later, or Firefox ESR to version 140.6 or later, where the use-after-free issue in the WebRTC signaling component has been fixed. Applying these updates will address the improper memory handling and prevent potential exploitation. [2, 3]
Can you explain this vulnerability to me?
This vulnerability is a use-after-free issue in the WebRTC signaling component of Firefox browsers. It affects versions of Firefox earlier than 146 and Firefox ESR earlier than 140.6. A use-after-free vulnerability occurs when a program continues to use memory after it has been freed, which can lead to unexpected behavior or exploitation.
How can this vulnerability impact me? :
This vulnerability could potentially allow an attacker to execute arbitrary code or cause a crash in the affected Firefox browsers by exploiting the use-after-free condition in the WebRTC signaling component. This could lead to compromise of the user's system or data.