---
id: CVE-2022-20421
title: >-
  In binder_inc_ref_for_node of binder.c, there is a possible way to corrupt
  memory due to a use after free
summary: >-
  In binder_inc_ref_for_node of binder.c, there is a possible way to corrupt
  memory due to a use after free. This could lead to local escalation of
  privilege with no additional execution privileges needed. User interaction is
  not needed fo…
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
vendor: google
product: android
affected:
  - android
  - debian_linux = 10.0
  - debian_linux = 11.0
published: '2022-10-11'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T15:16:59.690'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-20421'
references:
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: security@android.com
  - url: 'https://source.android.com/security/bulletin/2022-10-01'
    label: security@android.com
  - url: 'https://www.debian.org/security/2022/dsa-5257'
    label: security@android.com
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://source.android.com/security/bulletin/2022-10-01'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2022/dsa-5257'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-770721.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-831302.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - exploit-available
  - cve.org
epss: 0.00625
epssPercentile: 0.5008
exploits:
  github: 2
  githubRepos:
    - 'https://github.com/0xkol/badspin'
    - 'https://github.com/sandiyochristan/oo'
  checkedAt: '2026-11-05T15:10:20.549Z'
exploitAvailable: true
ingestedAt: '2026-10-14T15:36:13.919Z'
---

## Overview

In binder_inc_ref_for_node of binder.c, there is a possible way to corrupt memory due to a use after free. 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-239630375References: Upstream kernel

## Affected

- `android`
- `debian_linux = 10.0`
- `debian_linux = 11.0`

## Remediation

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