CVE-2026-46074 spi: ch341: fix memory leaks on probe failures
A use-after-free vulnerability in the Linux kernel's ch341 SPI driver allows attackers to cause denial of service or potentially execute code via probe failures.
- 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-2026-46074?
CVE-2026-46074 is a medium-severity use after free vulnerability in Linux kernel, published on 27 May 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:
spi: ch341: fix memory leaks on probe failures
Make sure to deregister the controller, disable pins, and kill and free the RX URB on probe failures to mirror disconnect and avoid memory leaks and use-after-free.
Also add an explicit URB kill on disconnect for symmetry (even if that is not strictly required as USB core would have stopped it in the current setup).
Weakness: CWE-401
Which versions are affected by CVE-2026-46074?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46074?
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-2026-46074 being exploited?
There is no known exploitation of CVE-2026-46074 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46074, DEBIAN-CVE-2026-46074, GHSA-rv45-g592-f3p6, UBUNTU-CVE-2026-46074.