CVE-2025-2837 Silicon Labs Gecko OS HTTP Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability

High 8.8 Published 26 Mar 2025 Updated 27 Mar 2025

Network-adjacent attackers can execute arbitrary code on Silicon Labs Gecko OS devices via a stack-based buffer overflow in HTTP request handling.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-2837?

CVE-2025-2837 is a high-severity memory corruption vulnerability in Silicon Labs Gecko OS, published on 26 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Silicon Labs Gecko OS HTTP Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Silicon Labs Gecko OS. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of HTTP requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-23245.

Weakness: CWE-121

Which versions are affected by CVE-2025-2837?

It affects 1 product.

Products include Silabs Gecko Os.

How do I fix CVE-2025-2837?

No fix has been published for CVE-2025-2837 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-2837 being exploited?

There is no known exploitation of CVE-2025-2837 in the wild and no public exploit code.

Sources

Also known as GHSA-c2w4-vpwj-jcm9.