CVE-2021-38788 json
The Background service in Allwinner R818 SoC Android Q SDK V1.0 is used to manage background applications.
published 2022-01-19 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-25225
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.68% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
References
-
allwinnertech.com
/index.php?c=product&a=index&id=92
product, vendor-advisory
-
github.com
/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9Abackground%20service%20has%20EoP%20Vulne
broken-link, third-party-advisory
-
cnvd.org.cn
/flaw/show/CNVD-2021-46928
third-party-advisory
-
vul.wangan.com
/a/CNVD-2021-46928
third-party-advisory
Sources
- CVE List CVE-2021-38788
- NVD CVE-2021-38788
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.