CVE-2026-90372
kernel: wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss
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 WiFi driver, affecting mt7915 devices. A remote attacker, by sending a specially crafted VHT/HE MCS map with no supported spatial streams, can trigger an integer underflow in the mt7915_mcu_get_sta_nss function. This results in an incorrect value being written to the firmware's beamforming fields, which could lead to a denial of service for the wireless interface.
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-787 · Out-of-bounds Write