CVE-2022-20421

HIGH

Android - Use-After-Free in binder_inc_ref_for_node

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2022-20421. PoCs published by 0xkol, sandiyochristan.

AI-analyzed exploit summary This repository contains a privilege escalation exploit for CVE-2022-20421, targeting Android Binder vulnerabilities in kernel versions 5.4.x and 5.10.x. It achieves kernel R/W primitives and, on Pixel 6 devices, full root and SELinux bypass.

Description

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

Exploits (2)

nomisec WORKING POC 280 stars
by 0xkol · poc
https://github.com/0xkol/badspin

This repository contains a privilege escalation exploit for CVE-2022-20421, targeting Android Binder vulnerabilities in kernel versions 5.4.x and 5.10.x. It achieves kernel R/W primitives and, on Pixel 6 devices, full root and SELinux bypass.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Racy
Target: Android kernel (versions 5.4.x and 5.10.x)
No auth needed
Prerequisites: Device with kernel version 5.4.x or 5.10.x · Android security patch level below October 2022
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec NO CODE
by sandiyochristan · poc
https://github.com/sandiyochristan/oo

References (3)

Core 3
Core References
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5257
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html

Scores

CVSS v3 7.8
EPSS 0.0065
EPSS Percentile 46.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-416
Status published
Products (3)
debian/debian_linux 10.0
debian/debian_linux 11.0
google/android
Published Oct 11, 2022
Tracked Since Feb 18, 2026