SB20260918291 - Reachable assertion in Linux kernel mediatek mt76 driver

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Main Vulnerability Database SB20260918291

SB20260918291 - Reachable assertion in Linux kernel mediatek mt76 driver

Published: September 18, 2026

Security Bulletin ID SB20260918291
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Reachable assertion (CVE-ID: CVE-2026-90382)

CWE-ID: CWE-617 - Reachable Assertion

CVSSv4: 6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a kernel panic and denial of service.

The vulnerability exists due to a reachable assertion in the mt76x02 receive-processing path when processing a corrupted wireless frame with a receive descriptor length larger than the received buffer. A remote attacker can transmit a corrupted over-the-air frame to cause a kernel panic and denial of service.

Exploitation requires monitor mode with the fcsfail filter enabled and panic_on_warn set.


Remediation

Install update from vendor's website.

References