SB2026092486 - NULL pointer dereference in Linux kernel realtek rtw88 driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-97516)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a null pointer dereference in rtw_fw_adaptivity_result() in the rtw88 wireless driver when processing a firmware adaptivity result with an undefined edcca_th configuration. A local user can cause the driver to process a firmware adaptivity result to cause a denial of service.

The issue occurs on devices using the 8821CE chip, which does not define edcca_th in its chip information.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1d1f250432cd8704c3c125168887f9724021c81a
• https://git.kernel.org/stable/c/6fa23cafaf30f4877e357f8eebcff00dff4aa9cb
• https://git.kernel.org/stable/c/d5e6f353ce1e1c25b8458ea390ed09d2377412c5