CVE-2026-31527 driver core: platform: use generic driver_override infrastructure
A race condition in the Linux kernel platform driver core allows a use-after-free, potentially enabling local attackers to execute code or escalate privileges.
- 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-2026-31527?
CVE-2026-31527 is a high-severity use after free vulnerability in Linux kernel, published on 22 Apr 2026. 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: platform: use generic driver_override infrastructure
When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF.
Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally.
Note that calling match() from __driver_attach() without the device lock held is intentional. [1]
Weakness: CWE-416
Which versions are affected by CVE-2026-31527?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31527?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-31527 being exploited?
There is no known exploitation of CVE-2026-31527 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31527, DEBIAN-CVE-2026-31527, GHSA-jr2g-46m2-f9rc, ROOT-OS-DEBIAN-11-CVE-2026-31527, ROOT-OS-DEBIAN-12-CVE-2026-31527, ROOT-OS-DEBIAN-13-CVE-2026-31527 and 3 more.