CVE-2021-38788
CVE-2021-38788 is a high-severity vulnerability in Allwinnertech Android Q Sdk with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 2% (74th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Allwinnertech Android Q Sdk
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2021-38788?
- CVE-2021-38788 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-38788 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-38788?
- CVE-2021-38788 affects Allwinnertech Android Q Sdk. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-38788?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-38788 published?
- CVE-2021-38788 was published on 2022-01-19 and last updated on 2026-06-17.
References
- https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9Abackground%20service%20has%20EoP%20Vulnerability.md
- https://vul.wangan.com/a/CNVD-2021-46928
- https://www.allwinnertech.com/index.php?c=product&a=index&id=92
- https://www.cnvd.org.cn/flaw/show/CNVD-2021-46928
Affected products (1)
- cpe:2.3:a:allwinnertech:android_q_sdk:1.0:*:*:*:*:*:*:*
More vulnerabilities in Allwinnertech Android Q Sdk
- CVE-2021-38789 — High (CVSS 7.5): Allwinner R818 SoC Android Q SDK V1.0 is affected by an incorrect access control vulnerability that does not check the…
- CVE-2021-38787 — High (CVSS 7.5): There is an integer overflow in the ION driver "/dev/ion" of Allwinner R818 SoC Android Q SDK V1.0 that could use the…
- CVE-2021-38786 — High (CVSS 7.5): There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q SDK V1.0, which could…
- CVE-2021-38785 — High (CVSS 7.5): There is a NULL pointer deference in the Allwinner R818 SoC Android Q SDK V1.0 camera driver /dev/cedar_dev that could…
- CVE-2021-38784 — High (CVSS 7.5): There is a NULL pointer dereference in the syscall open_exec function of Allwinner R818 SoC Android Q SDK V1.0 that…
- CVE-2021-38783 — High (CVSS 7.5): There is a Out-of-Bound Write in the Allwinner R818 SoC Android Q SDK V1.0 camera driver "/dev/cedar_dev" through iotcl…