CVE-2026-72158

Technical Description

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

fpga: dfl: add bounds check in dfh_get_param_size()

dfh_get_param_size() can return a parameter size larger than the feature

region because the loop bounds check is evaluated before incrementing

size. If the EOP (End of Parameters) bit is set in the same iteration,

the inflated size is returned without re-validation against max.

This can cause create_feature_instance() to call memcpy_fromio() with a

size exceeding the ioremap'd region when a malicious FPGA device provides

crafted DFHv1 parameter headers.

Add a bounds check after the size increment to ensure the accumulated

size never exceeds the feature boundary.

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