---
id: CVE-2024-42132
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX

  Syzbot hit warning in hci_conn_del() caused by freeing handle that was
  not allocated using ida a…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX

  Syzbot hit warning in hci_conn_del() caused by freeing handle that was
  not allocated using ida a…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-763
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.5.12, < 6.6'
  - 'linux_kernel >= 6.6.2, < 6.6.39'
  - 'linux_kernel >= 6.7, < 6.9.9'
  - linux_kernel = 6.10
patched:
  - linux_kernel 6.9.9
published: '2024-07-30'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-42132'
references:
  - url: 'https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2ae8d7742a09c275872e670c53337b3dcedaa11c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0029
epssPercentile: 0.19217
ingestedAt: '2026-07-24T15:30:57.633Z'
---

## Overview

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

bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX

Syzbot hit warning in hci_conn_del() caused by freeing handle that was
not allocated using ida allocator.

This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by
hci_le_big_sync_established_evt(), which makes code think it's unset
connection.

Add same check for handle upper bound as in hci_conn_set_handle() to
prevent warning.

## Affected

- `linux_kernel >= 6.5.12, < 6.6`
- `linux_kernel >= 6.6.2, < 6.6.39`
- `linux_kernel >= 6.7, < 6.9.9`
- `linux_kernel = 6.10`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.9.9`