CVE-2026-0882
Use-After-Free in Firefox IPC Component Causes Potential Exploits
Publication date: 2026-01-13
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 147 (exc) |
| mozilla | firefox_esr | to 115.32 (exc) |
| mozilla | firefox_esr | to 140.7 (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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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
Can you explain this vulnerability to me?
This vulnerability is a use-after-free flaw in the IPC (Inter-Process Communication) component of Firefox. It affects Firefox versions prior to 147, Firefox ESR versions prior to 115.32, and Firefox ESR versions prior to 140.7. A use-after-free vulnerability occurs when a program continues to use memory after it has been freed, which can lead to crashes, arbitrary code execution, or other security issues.
How can this vulnerability impact me? :
The vulnerability has a high impact with a CVSS score of 8.8, indicating it can lead to severe consequences such as unauthorized code execution, complete compromise of confidentiality, integrity, and availability of the affected system. Exploiting this use-after-free flaw could allow attackers to execute arbitrary code or cause denial of service within the Firefox browser environment.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should update Firefox to version 147 or later, or Firefox ESR to version 115.32 or later, including ESR 140.7 or later. These versions contain fixes addressing the use-after-free vulnerability in the IPC component. [1, 2, 3]