# CVE-2022-20421 — Android

> As of 2024-08-03, CVE-2022-20421 is a vulnerability in Android, EPSS 0.7% (52.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2022-20421, most recently “Android Exploit Chain — Saito Tech Commercial Spyware: ART Runtime RCE, Binder UAF LPE, Pixel Bootloader Persistence (CVE-2026-22104, CVE-2026-22107, CVE-2026-22112)”.

**Last updated:** 2024-08-03

## What is CVE-2022-20421?

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

1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 1483 days ago.

## Severity and exploitation probability

- **EPSS (FIRST):** 0.7% probability of exploitation in the next 30 days, higher than 52.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2022-10-11, last modified 2024-08-03

## Is CVE-2022-20421 being exploited?

Weaponised exploit code for CVE-2022-20421 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 26 in the Threadlinqs vulnerability feed.

- [0xkol/badspin](https://github.com/0xkol/badspin) (github)
- [sandiyochristan/oo](https://github.com/sandiyochristan/oo) (github)
- [trickest/cve](https://github.com/trickest/cve/blob/main/2022/CVE-2022-20421.md) (trickest)

## Affected products and versions

- **(vendor unspecified)**: Android

## How to fix CVE-2022-20421

No vendor patch reference has been recorded for CVE-2022-20421 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2022-20421

1 tracked threat in the Threadlinqs corpus references CVE-2022-20421, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Android Exploit Chain — Saito Tech Commercial Spyware: ART Runtime RCE, Binder UAF LPE, Pixel Bootloader Persistence (CVE-2026-22104, CVE-2026-22107, CVE-2026-22112)](https://intel.threadlinqs.com/threat/TL-2026-0177) — CRITICAL · 2026-03-06

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [debian.org — vendor advisory](https://www.debian.org/security/2022/dsa-5257)

**Mailing list and disclosure**

- [lists.debian.org — mailing list](https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html)

**Other references**

- [source.android.com](https://source.android.com/security/bulletin/2022-10-01)

Canonical: https://intel.threadlinqs.com/cve/CVE-2022-20421
Full detection coverage and IOCs for threats exploiting CVE-2022-20421 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp