SB2026062937 - Improper input validation in Linux kernel mt76 mt7921 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper input validation (CVE-ID: CVE-2026-53317)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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/E:U/U:Clear

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

The vulnerability exists due to improper input validation in the mt7921 wifi driver when handling station association identifiers on IFTYPE_AP interfaces. A local user can configure a station with an out-of-range AID value to cause a denial of service.

The issue was observed on 7922 hardware and only on IFTYPE_AP interfaces; IFTYPE_STATION behavior was not reported as affected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1a4b802afe15c5b33b2dcb37a594aba2fa215d52
• https://git.kernel.org/stable/c/35835ff71e6e618155578b8e3905597edd5f601c
• https://git.kernel.org/stable/c/4d0bf21e3e20619d51d06c0c36207aabab8b712c
• https://git.kernel.org/stable/c/6dbe70f9ef14d8ac1c24bf19fd9510978a3ab952