---
id: CVE-2026-74510
title: 'Bluetooth: mgmt: fix UAF in pair command cancellation'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: mgmt: fix UAF in pair command cancellation

  The pairing completion and authentication failure callbacks look up the
  pending MGMT_OP_PAIR_DEVICE command by wa…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 <
    50af4280a587c9971b5388cbc438f1324e626b7b
  - >-
    Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 <
    86ed4dd6548ccf277bc691bc912ca06e76b9d80c
  - >-
    Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 <
    7c2a152a897cd1c184b2051484d4f74d803e7f4a
  - >-
    Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 <
    c569def320aa8b1fde89227e2ea96606790fd86d
  - >-
    Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 <
    51be7280980fddc90ebe874a69c2fe8ab02bb46a
  - >-
    Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 <
    d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd
  - Linux 2.6.39
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:58:39.693080Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:05:51.530Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74510'
references:
  - url: 'https://git.kernel.org/stable/c/50af4280a587c9971b5388cbc438f1324e626b7b'
  - url: 'https://git.kernel.org/stable/c/86ed4dd6548ccf277bc691bc912ca06e76b9d80c'
  - url: 'https://git.kernel.org/stable/c/7c2a152a897cd1c184b2051484d4f74d803e7f4a'
  - url: 'https://git.kernel.org/stable/c/c569def320aa8b1fde89227e2ea96606790fd86d'
  - url: 'https://git.kernel.org/stable/c/51be7280980fddc90ebe874a69c2fe8ab02bb46a'
  - url: 'https://git.kernel.org/stable/c/d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd'
tags:
  - cve.org
epss: 0.00139
epssPercentile: 0.0295
ingestedAt: '2026-10-16T19:46:24.351Z'
---

## Overview

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

Bluetooth: mgmt: fix UAF in pair command cancellation

The pairing completion and authentication failure callbacks look up the
pending MGMT_OP_PAIR_DEVICE command by walking hdev->mgmt_pending. The
lookup returned a command that was still linked on the shared pending list,
without keeping mgmt_pending_lock held for the later dereference and
removal.

A concurrent MGMT_OP_CANCEL_PAIR_DEVICE request can remove and free the
same pending command before the callback uses it. The reverse race is also
possible when cancel_pair_device() gets a command from pending_find() and a
callback removes it before the cancel path dereferences it. This can lead
to a use-after-free and a second list_del().

Make the pairing lookup helpers transfer ownership of the pending command
by removing it from hdev->mgmt_pending while holding mgmt_pending_lock.
The callbacks and cancel path then complete the command and free it
directly, so racing paths cannot find or free the same command again. Take
a temporary hci_conn reference in cancel_pair_device() because the command
completion drops the reference stored in the pending command.

## Affected

- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 50af4280a587c9971b5388cbc438f1324e626b7b`
- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 86ed4dd6548ccf277bc691bc912ca06e76b9d80c`
- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 7c2a152a897cd1c184b2051484d4f74d803e7f4a`
- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < c569def320aa8b1fde89227e2ea96606790fd86d`
- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 51be7280980fddc90ebe874a69c2fe8ab02bb46a`
- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd`
- `Linux 2.6.39`

## Remediation

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