CVE-2025-39837 platform/x86: asus-wmi: Fix racy registrations
A race condition in the ASUS WMI driver can cause memory corruption and system crashes on ASUS machines.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-39837?
CVE-2025-39837 is a high-severity vulnerability in Linux kernel, published on 19 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
platform/x86: asus-wmi: Fix racy registrations
asus_wmi_register_driver() may be called from multiple drivers concurrently, which can lead to the racy list operations, eventually corrupting the memory and hitting Oops on some ASUS machines. Also, the error handling is missing, and it forgot to unregister ACPI lps0 dev ops in the error case.
This patch covers those issues by introducing a simple mutex at acpi_wmi_register_driver() & *_unregister_driver, and adding the proper call of asus_s2idle_check_unregister() in the error path.
Weakness: CWE-787
Which versions are affected by CVE-2025-39837?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-39837?
Apply the vendor's patch.
Is CVE-2025-39837 being exploited?
There is no known exploitation of CVE-2025-39837 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-39837, DEBIAN-CVE-2025-39837, GHSA-g3gw-5g8v-fphj, UBUNTU-CVE-2025-39837.