SB2026092574 - Improper Validation of Array Index in Linux kernel iwlwifi mvm driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Validation of Array Index (CVE-ID: CVE-2026-93799)

CWE-ID: CWE-129 - Improper Validation of Array Index

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to perform an out-of-bounds array access.

The vulnerability exists due to improper validation of an array index in the iwl_mvm_window_status_notif BA window status notification handler when processing a BA window status notification. A local user can cause processing of a notification containing an invalid station ID to perform an out-of-bounds array access.

The station ID is extracted as a 5-bit value from the firmware notification and is used to index the fw_id_to_mac_id[] array.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6aa77efaea9efea92e3090c35ad348fd759a3cf3
• https://git.kernel.org/stable/c/bb08fbbbd5568d33069485ecb0a1657f115a4e9f
• https://git.kernel.org/stable/c/e35ae757c6462bfd3437bf58121bb721fe1f790c