CVE-2021-38786
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q...
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q SDK V1.0, which could cause a media crash (denial of service).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q SDK V1.0, which could cause a media crash (denial of service).
- Record
CVE-2021-38786- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q SDK V1.0, which could cause a media crash (denial of service).
- Record
CVE-2021-38786- Updated
- 2026-11-02
EUVDEUVD-2021-25223 No score
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q SDK V1.0, which could cause a media crash (denial of service).
- Record
EUVD-2021-25223- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4h5q-q65q-355x No score
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q...
There is a NULL pointer dereference in media/libcedarc/vdecoder of Allwinner R818 SoC Android Q SDK V1.0, which could cause a media crash (denial of service).
- Record
GHSA-4h5q-q65q-355x- Weakness
- CWE-476
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-38786 is a high vulnerability (CVSS 7.5) in Allwinnertech Android Q Sdk, published January 19, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.78%, the 78th percentile. No source names a fixed version.
References
allwinnertech.com/index.php?c=product&a=index&id=92
github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9AMedia%20vdecoder%20has%20Null%20Pointer%20Dereference%20Vulnerability.md
cnvd.org.cn/flaw/show/CNVD-2021-49173
vul.wangan.com/a/CNVD-2021-49173
nvd.nist.gov/vuln/detail/CVE-2021-38786