---
id: CVE-2024-26801
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: Avoid potential use-after-free in hci_error_reset

  While handling the HCI_EV_HARDWARE_ERROR event, if the underlying
  BT controller is not responding, the GPI…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: Avoid potential use-after-free in hci_error_reset

  While handling the HCI_EV_HARDWARE_ERROR event, if the underlying
  BT controller is not responding, the GPI…
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-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.0, < 4.19.309'
  - 'linux_kernel >= 4.20, < 5.4.271'
  - 'linux_kernel >= 5.5, < 5.10.212'
  - 'linux_kernel >= 5.11, < 5.15.151'
  - 'linux_kernel >= 5.16, < 6.1.81'
  - 'linux_kernel >= 6.2, < 6.6.21'
  - 'linux_kernel >= 6.7, < 6.7.9'
  - linux_kernel = 6.8
patched:
  - linux_kernel 6.7.9
published: '2024-04-04'
updated: '2026-08-04'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26801'
references:
  - url: 'https://git.kernel.org/stable/c/2449007d3f73b2842c9734f45f0aadb522daf592'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2ab9a19d896f5a0dd386e1f001c5309bc35f433b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/45085686b9559bfbe3a4f41d3d695a520668f5e1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6dd0a9dfa99f8990a08eb8fdd8e79bee31c7d8e2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/98fb98fd37e42fd4ce13ff657ea64503e24b6090'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da4569d450b193e39e87119fd316c0291b585d14'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dd594cdc24f2e48dab441732e6dfcafd6b0711d1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e0b278650f07acf2e0932149183458468a731c03'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2449007d3f73b2842c9734f45f0aadb522daf592'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/2ab9a19d896f5a0dd386e1f001c5309bc35f433b'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/45085686b9559bfbe3a4f41d3d695a520668f5e1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/6dd0a9dfa99f8990a08eb8fdd8e79bee31c7d8e2'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/98fb98fd37e42fd4ce13ff657ea64503e24b6090'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/da4569d450b193e39e87119fd316c0291b585d14'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/dd594cdc24f2e48dab441732e6dfcafd6b0711d1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://git.kernel.org/stable/c/e0b278650f07acf2e0932149183458468a731c03'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00422
epssPercentile: 0.33781
ingestedAt: '2026-08-05T10:46:49.152Z'
---

## Overview

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

Bluetooth: Avoid potential use-after-free in hci_error_reset

While handling the HCI_EV_HARDWARE_ERROR event, if the underlying
BT controller is not responding, the GPIO reset mechanism would
free the hci_dev and lead to a use-after-free in hci_error_reset.

Here's the call trace observed on a ChromeOS device with Intel AX201:
   queue_work_on+0x3e/0x6c
   __hci_cmd_sync_sk+0x2ee/0x4c0 [bluetooth <HASH:3b4a6>]
   ? init_wait_entry+0x31/0x31
   __hci_cmd_sync+0x16/0x20 [bluetooth <HASH:3b4a 6>]
   hci_error_reset+0x4f/0xa4 [bluetooth <HASH:3b4a 6>]
   process_one_work+0x1d8/0x33f
   worker_thread+0x21b/0x373
   kthread+0x13a/0x152
   ? pr_cont_work+0x54/0x54
   ? kthread_blkcg+0x31/0x31
    ret_from_fork+0x1f/0x30

This patch holds the reference count on the hci_dev while processing
a HCI_EV_HARDWARE_ERROR event to avoid potential crash.

## Affected

- `linux_kernel >= 4.0, < 4.19.309`
- `linux_kernel >= 4.20, < 5.4.271`
- `linux_kernel >= 5.5, < 5.10.212`
- `linux_kernel >= 5.11, < 5.15.151`
- `linux_kernel >= 5.16, < 6.1.81`
- `linux_kernel >= 6.2, < 6.6.21`
- `linux_kernel >= 6.7, < 6.7.9`
- `linux_kernel = 6.8`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.7.9`