CVE-2026-3847
Memory Corruption in Firefox <148.0.2 Enables Code Execution
Publication date: 2026-03-10
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 148.0.2 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 involves memory safety bugs found in Firefox version 148.0.2 and earlier. Some of these bugs showed signs of memory corruption, which means that with enough effort, an attacker could potentially exploit them to execute arbitrary code on the affected system.
How can this vulnerability impact me? :
The impact of this vulnerability is significant because it could allow an attacker to run arbitrary code remotely with low attack complexity and no privileges required. This means an attacker could potentially take control of your system, leading to confidentiality, integrity, and availability breaches.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know