---
id: CVE-2022-20566
title: >-
  In l2cap_chan_put of l2cap_core, there is a possible use after free due to
  improper locking
summary: >-
  In l2cap_chan_put of l2cap_core, there is a possible use after free due to
  improper locking. This could lead to local escalation of privilege with no
  additional execution privileges needed. User interaction is not needed for
  exploitation…
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'
cwe:
  - CWE-416
  - CWE-667
  - CWE-416
  - CWE-667
vendor: google
product: android
affected:
  - android
published: '2022-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:17:22.733'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-20566'
references:
  - url: 'https://source.android.com/security/bulletin/pixel/2022-12-01'
    label: security@android.com
  - url: 'https://source.android.com/security/bulletin/pixel/2022-12-01'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00204
epssPercentile: 0.09643
ingestedAt: '2026-10-14T16:40:32.048Z'
---

## Overview

In l2cap_chan_put of l2cap_core, there is a possible use after free due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-165329981References: Upstream kernel

## Affected

- `android`

## Remediation

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