SB20260925223 - Improper Check for Unusual or Exceptional Conditions in Linux kernel mediatek mt76 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-90381)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to compromise confidentiality, integrity, and availability.

The vulnerability exists due to improper handling of channel contexts in mt76_switch_vif_chanctx() when performing channel switches on different radios within a short timeframe. A remote attacker can perform channel switches on different radios within a short timeframe to compromise confidentiality, integrity, and availability.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/063169a2755abdcbe7698d98360336abb6bef414
• https://git.kernel.org/stable/c/70869cc429fffc77de51e7777c0ecb651e8fca07