SB2026081589 - NULL pointer dereference in Linux kernel ath ath12k driver

Description

This security bulletin contains information about 1 vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2026-74366)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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 ath12k_mac_op_change_sta_links in the ath12k wireless driver when handling unready link states. A local user can trigger link-handling operations that leave a broken link in links_map to cause a denial of service.

The crash can be triggered by subsequent operations such as disconnect handling or PTK key installation for the affected link.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/47809a7c8348bc4a332ccc26a37c7145a5f609f8
• https://git.kernel.org/stable/c/5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f
• https://git.kernel.org/stable/c/cfcea221db933295bf2cd75a7f80d441c7a51e28