---
id: CVE-2026-80935
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

  mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block
  copy from the address …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

  mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block
  copy from the address …
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    388f471ca4758f644394b681ce97677a4d0e772c
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    9e5abb5e2ade0b6fd0e47209711115d47a255176
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    6be59da2063d5b3522bfde8aae0487ec095eb384
  - >-
    Linux >= 98686cd21624c75a043e96812beadddf4f6f48e5 <
    13b3c29a782033ce4a230be9e5618032813dbcd4
  - Linux 6.2
published: '2026-09-11'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:41.060'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80935'
references:
  - url: 'https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/388f471ca4758f644394b681ce97677a4d0e772c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80935.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-80935'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532054'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-80935'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80935'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80935.mbox
  - url: 'https://git.kernel.org/stable/c/4892be1ef0bbe6db6b13bf46cb79b6706bb5b214'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00255
epssPercentile: 0.16947
scores:
  nvd: 8.8
  vendor: 5.5
  cna: 8.8
ingestedAt: '2026-09-14T15:23:07.455Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block
copy from the address reported by the MCU response (event->addr, a
device-controlled __le32) and clamps only the copy length, never the
destination offset into dev->mt76.eeprom.data. A malicious or
malfunctioning device can report an arbitrary address and drive an
out-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past
eeprom.data.

Reject a response whose address would place the copy outside eeprom.data
before deriving the destination pointer. Devices that echo the requested
in-bounds offset are unaffected.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80935.json)