CVE-2026-97516

/// Technical description

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

wifi: rtw88: Add NULL check for chip->edcca_th in rtw_fw_adaptivity_result()

It was recently reported that rtw_fw_adaptivity_result()

in fw.c dereferences rtwdev->chip->edcca_th without

a NULL check. The issue is that devices with the

8821CE chip don't define edcca_th in their chip

info. As a result, when rtw_fw_adaptivity_result()

tries to dereference it, the kernel triggers an oops.

Add a NULL check for edcca_th before dereferencing

it in rtw_fw_adaptivity_result() in fw.c. Placing

the check at the function entry avoids logging any

garbage values.

This change does not address the root cause for

this behavior, but it prevents the NULL dereference

and the resulting oops while a more permanent solution

is developed.

Tested on a 8822CE chip which defines edcca_th, so

this issue is not present on it, but it still uses

this driver and I can verify there are no regressions.

/// 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