---
title: "CVE-2026-90372: Linux kernel mt76 mt7915 - Buffer Underflow"
description: "Linux kernel mt76 mt7915 contains a buffer underflow caused by improper handling of peer's VHT/HE MCS map with no supported spatial stream in mt7915_mcu_get_sta_nss, letting attackers cause potential data corruption, exploit requires crafted peer MCS map."
url: https://panop.io/threat-heartbeat/CVE-2026-90372/
---

# CVE-2026-90372 Linux kernel mt76 mt7915 - Buffer Underflow

Linux kernel mt76 mt7915 contains a buffer underflow caused by improper handling of peer's VHT/HE MCS map with no supported spatial stream in mt7915\_mcu\_get\_sta\_nss, letting attackers cause potential data corruption, exploit requires crafted peer MCS map.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.36% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90372)

## Details

Type

Buffer Underflow

Impact

Denial Of Service, Data Tampering

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for mt7915\_mcu\_get\_sta\_nss.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90372](https://nvd.nist.gov/vuln/detail/CVE-2026-90372)
- [https://git.kernel.org/stable/c/e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6](https://git.kernel.org/stable/c/e63c6291ecddf94769ab91f9d8cdb6ca939f7fc6)
- [https://git.kernel.org/stable/c/ecfd1a07e78c31d81322fb2d81dc468081cc3004](https://git.kernel.org/stable/c/ecfd1a07e78c31d81322fb2d81dc468081cc3004)
- [https://git.kernel.org/stable/c/25f753f7f620955a8a51e63e445d8b9076c51396](https://git.kernel.org/stable/c/25f753f7f620955a8a51e63e445d8b9076c51396)
- [https://git.kernel.org/stable/c/2801477c36a19be4f549fe60e54995f03b0ea7b9](https://git.kernel.org/stable/c/2801477c36a19be4f549fe60e54995f03b0ea7b9)
- [https://git.kernel.org/stable/c/38f4d6323bcd65e41a691432eddabd2b03acdeee](https://git.kernel.org/stable/c/38f4d6323bcd65e41a691432eddabd2b03acdeee)
- [https://git.kernel.org/stable/c/4a2f4be532e3ea4e2b536e411793a05aaa51af25](https://git.kernel.org/stable/c/4a2f4be532e3ea4e2b536e411793a05aaa51af25)
- [https://git.kernel.org/stable/c/6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7](https://git.kernel.org/stable/c/6ce78d04c7ea4b66838941b5a4232dd1ee0e2cc7)
- [https://git.kernel.org/stable/c/85bd46ab7674b6d357f9a14791352c65fb09eee9](https://git.kernel.org/stable/c/85bd46ab7674b6d357f9a14791352c65fb09eee9)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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