---
id: CVE-2022-20153
title: >-
  In rcu_cblist_dequeue of rcu_segcblist.c, there is a possible use-after-free
  due to improper locking
summary: >-
  In rcu_cblist_dequeue of rcu_segcblist.c, there is a possible use-after-free
  due to improper locking. This could lead to local escalation of privilege in
  the kernel with System execution privileges needed. User interaction is not
  needed …
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-667
vendor: google
product: android
affected:
  - android
published: '2022-06-15'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T22:17:16.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-20153'
references:
  - url: 'https://source.android.com/security/bulletin/pixel/2022-06-01'
    label: security@android.com
  - url: 'https://source.android.com/security/bulletin/pixel/2022-06-01'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00125
epssPercentile: 0.01939
ingestedAt: '2026-10-08T23:16:47.345Z'
---

## Overview

In rcu_cblist_dequeue of rcu_segcblist.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-222091980References: Upstream kernel

## Affected

- `android`

## Remediation

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