CVE-2024-36479

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

fpga: bridge: add owner module and take its refcount

The current implementation of the fpga bridge assumes that the low-level

module registers a driver for the parent device and uses its owner pointer

to take the module's refcount. This approach is problematic since it can

lead to a null pointer dereference while attempting to get the bridge if

the parent device does not have a driver.

To address this problem, add a module owner pointer to the fpga_bridge

struct and use it to take the module's refcount. Modify the function for

registering a bridge to take an additional owner module parameter and

rename it to avoid conflicts. Use the old function name for a helper macro

that automatically sets the module that registers the bridge as the owner.

This ensures compatibility with existing low-level control modules and

reduces the chances of registering a bridge without setting the owner.

Also, update the documentation to

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References