---
title: "CVE-2026-80933: Linux kernel mt76 - Out of Bounds Read"
description: "Linux kernel mt76 mt7996 driver contains a buffer overflow caused by lack of length validation of default EEPROM firmware, letting attackers cause out-of-bounds read, exploit requires supplying truncated firmware file."
url: https://panop.io/threat-heartbeat/CVE-2026-80933/
---

# CVE-2026-80933 Linux kernel mt76 - Out of Bounds Read

Linux kernel mt76 mt7996 driver contains a buffer overflow caused by lack of length validation of default EEPROM firmware, letting attackers cause out-of-bounds read, exploit requires supplying truncated firmware file.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-80933)

## Details

Type

Out of Bounds Read

Impact

Information Disclosure, Denial Of Service

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to a version that rejects EEPROM files shorter than MT7996\_EEPROM\_SIZE or latest kernel version.

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-2026-80933](https://nvd.nist.gov/vuln/detail/CVE-2026-80933)
- [https://git.kernel.org/stable/c/03b81f015dbb29807ce1ec6d45537d658abdac69](https://git.kernel.org/stable/c/03b81f015dbb29807ce1ec6d45537d658abdac69)
- [https://git.kernel.org/stable/c/653c6e289b13cc6942f3e8f8e3c568e70fa42d1f](https://git.kernel.org/stable/c/653c6e289b13cc6942f3e8f8e3c568e70fa42d1f)
- [https://git.kernel.org/stable/c/7074ec3769820302f1ccf8794a40a6582153b820](https://git.kernel.org/stable/c/7074ec3769820302f1ccf8794a40a6582153b820)
- [https://git.kernel.org/stable/c/127a291f4c8069a4e71906938402cacfe24ee8cd](https://git.kernel.org/stable/c/127a291f4c8069a4e71906938402cacfe24ee8cd)
- [https://git.kernel.org/stable/c/b4bf67cc0871b13103c404b38e332b9d4403a0da](https://git.kernel.org/stable/c/b4bf67cc0871b13103c404b38e332b9d4403a0da)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)