CVE-2026-90366
kernel: wifi: mt76: mt7996: reserve space for the CSA-abort countdown TLV
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 20, 2026
Description
A flaw was found in the Linux kernel's mt76 Wi-Fi driver, specifically affecting mt7996 devices. When a Channel Switch Announcement (CSA) countdown is active and Multiple Basic Service Set Identifier (MBSSID) is enabled, the driver may attempt to write more beacon data than allocated. This can lead to a buffer overflow, triggering a kernel panic and resulting in a denial of service (DoS) to the system.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-131 · Incorrect Calculation of Buffer Size