CVE-2025-5865 RT-Thread Parameter lwp_syscall.c sys_select memory corruption
Attackers can trigger memory corruption in RT-Thread via the sys_select timeout parameter, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-5865?
CVE-2025-5865 is a high-severity memory corruption vulnerability in RT-Thread, published on 9 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in RT-Thread 5.1.0. It has been rated as critical. Affected by this issue is the function sys_select of the file rt-thread/components/lwp/lwp_syscall.c of the component Parameter Handler. The manipulation of the argument timeout leads to memory corruption. The vendor explains, that "[t]he timeout parameter should be checked to check if it can be accessed correctly in kernel mode and used temporarily in kernel memory."
Weakness: CWE-119
Which versions are affected by CVE-2025-5865?
It affects 1 product.
Products include Rt-Thread Rt-Thread.
How do I fix CVE-2025-5865?
No fix has been published for CVE-2025-5865 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-2025-5865 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5865 exists.
Other vulnerabilities in RT-Thread
Sources
Also known as GHSA-4xh2-4xwh-6pgr.