CVE-2021-38788

Name: CVE-2021-38788
Creator: NVD / NIST
Published: 2022-01-19T16:15:07.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.68%

Last modified Jun 17, 2026

CVE-2021-38788 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.68% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.68%

73.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Allwinnertech	Android Q Sdk	1.0

References

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

Timeline

Published: Jan 19, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38788?

How severe is CVE-2021-38788?

CVE-2021-38788 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.68% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38788?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-38788?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST