CVE-2021-38788

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.

• 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

Published

Jan 19, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-3878corenlp is vulnerable to Improper Restriction of XML Externa…9.8
• CVE-2021-38783There is a Out-of-Bound Write in the Allwinner R818 SoC Andr…7.5
• CVE-2021-38784There is a NULL pointer dereference in the syscall open_exec…7.5
• CVE-2021-38785There is a NULL pointer deference in the Allwinner R818 SoC …7.5
• CVE-2021-38786There is a NULL pointer dereference in media/libcedarc/vdeco…7.5
• CVE-2021-38787There is an integer overflow in the ION driver "/dev/ion" of…7.5
• CVE-2021-38789Allwinner R818 SoC Android Q SDK V1.0 is affected by an inco…7.5
• CVE-2021-3879snipe-it is vulnerable to Improper Neutralization of Input D…5.4
• CVE-2021-3880Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-3881libmobi is vulnerable to Out-of-bounds Read9.8
• CVE-2021-38819A SQL injection vulnerability exits on the Simple Image Gall…8.8
• CVE-2021-3882LedgerSMB does not set the 'Secure' attribute on the session…6.8