---
id: CVE-2025-40294
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern()

  In the parse_adv_monitor_pattern() function, the value of
  the 'length' variable is currently limited to …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern()

  In the parse_adv_monitor_pattern() function, the value of
  the 'length' variable is currently limited to …
severity: none
published: '2025-12-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T22:10:00.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-40294'
references:
  - url: 'https://git.kernel.org/stable/c/3a50d59b3781bc3a4e96533612509546a4c309a7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4b7d4aa5399b5a64caee639275615c63c008540d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5f7350ff2b179764a4f40ba4161b60b8aaef857b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8d59fba49362c65332395789fd82771f1028d87e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/96616530f524a0a76248cd44201de0a9e8526190'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00201
epssPercentile: 0.09313
ingestedAt: '2026-10-14T23:00:02.016Z'
---

## Overview

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

Bluetooth: MGMT: Fix OOB access in parse_adv_monitor_pattern()

In the parse_adv_monitor_pattern() function, the value of
the 'length' variable is currently limited to HCI_MAX_EXT_AD_LENGTH(251).
The size of the 'value' array in the mgmt_adv_pattern structure is 31.
If the value of 'pattern[i].length' is set in the user space
and exceeds 31, the 'patterns[i].value' array can be accessed
out of bound when copied.

Increasing the size of the 'value' array in
the 'mgmt_adv_pattern' structure will break the userspace.
Considering this, and to avoid OOB access revert the limits for 'offset'
and 'length' back to the value of HCI_MAX_AD_LENGTH.

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.

## Remediation

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