CVE-2025-37800 driver core: fix potential NULL pointer dereference in dev_uevent()
A race condition in the Linux kernel driver core can cause a NULL pointer dereference and system crash when unbinding a device while reading its uevent attribute.
- 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-2025-37800?
CVE-2025-37800 is a high-severity vulnerability in Linux kernel, published on 8 May 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:
driver core: fix potential NULL pointer dereference in dev_uevent()
If userspace reads "uevent" device attribute at the same time as another threads unbinds the device from its driver, change to dev->driver from a valid pointer to NULL may result in crash. Fix this by using READ_ONCE() when fetching the pointer, and take bus' drivers klist lock to make sure driver instance will not disappear while we access it.
Use WRITE_ONCE() when setting the driver pointer to ensure there is no tearing.
Weakness: CWE-476
Which versions are affected by CVE-2025-37800?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-37800?
Apply the vendor's patch.
Is CVE-2025-37800 being exploited?
There is no known exploitation of CVE-2025-37800 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-63788, BELL-CVE-2025-37800, DEBIAN-CVE-2025-37800, GHSA-3g6q-j56q-qw54, ROOT-OS-DEBIAN-11-CVE-2025-37800, ROOT-OS-DEBIAN-12-CVE-2025-37800 and 3 more.