CVE-2026-4737
Use-After-Free in Echo-Mate Kernel Module Risks Memory Corruption
Publication date: 2026-03-24
Last updated on: 2026-03-24
Assigner: Government Technology Agency of Singapore Cyber Security Group (GovTech CSG)
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| no-chicken | echo-mate | to 250329 (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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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?
CVE-2026-4737 is a Use After Free vulnerability found in the Echo-Mate project, specifically in the cloned kernel code within the function anon_vma->degree located in the file SDK/rv1106-sdk/sysdrv/source/kernel/mm/rmap.c.
This vulnerability originated because the Echo-Mate code was cloned from the Linux kernel but missed a critical security patch that had been applied upstream. The missing patch led to improper handling of anon_vma->degree, which could be exploited.
The issue was fixed by backporting the security patch from the original Linux kernel (commit 2555283), eliminating the security risk.
How can this vulnerability impact me? :
This Use After Free vulnerability can lead to potential exploitation of the Echo-Mate system, possibly allowing an attacker with limited privileges to cause memory corruption or execute arbitrary code.
Given the CVSS base score of 7.3, the vulnerability is considered high severity, indicating a significant risk if exploited.
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?
To mitigate the CVE-2026-4737 vulnerability, you should apply the security patch that fixes the use-after-free issue in the anon_vma->degree function within the Echo-Mate kernel code.
This patch is based on the upstream Linux kernel commit 2555283 and was backported to Echo-Mate in a pull request merged on November 30, 2025.
Updating your Echo-Mate installation to a version including this patch (i.e., version V250329 or later) will eliminate the security risk.