CVE-2023-53758 spi: atmel-quadspi: Free resources even if runtime resume failed in .remove()
A flaw in the Atmel QuadSPI driver allows a local attacker to cause a system crash by triggering a null pointer dereference during device removal.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53758?
CVE-2023-53758 is a vulnerability in Linux, published on 8 Dec 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:
spi: atmel-quadspi: Free resources even if runtime resume failed in .remove()
An early error exit in atmel_qspi_remove() doesn't prevent the device unbind. So this results in an spi controller with an unbound parent and unmapped register space (because devm_ioremap_resource() is undone). So using the remaining spi controller probably results in an oops.
Instead unregister the controller unconditionally and only skip hardware access and clk disable.
Also add a warning about resume failing and return zero unconditionally. The latter has the only effect to suppress a less helpful error message by the spi core.
Which versions are affected by CVE-2023-53758?
How do I fix CVE-2023-53758?
Apply the vendor's patch.
Is CVE-2023-53758 being exploited?
There is no known exploitation of CVE-2023-53758 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53758, DEBIAN-CVE-2023-53758, GHSA-c2v7-4942-cq2h, UBUNTU-CVE-2023-53758.