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CVE-2021-38783

25
FAUCET Score

CVE-2021-38783 describes an Out-of-Bounds Write vulnerability in the Allwinner R818 SoC Android Q SDK V1.0 camera driver, specifically within the "/dev/cedar_dev" through IOCTL_SET_PROC_INFO and IOCTL_COPY_PROC_INFO commands. This flaw affects Allwinnertech Android Q SDK and R818 products. Rated with a CVSS score of 7.5 (HIGH), this vulnerability is remotely exploitable with low attack complexity, potentially leading to a system crash or Elevation of Privilege. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:allwinnertech:android_q_sdk:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.82%
Probability of exploitation in next 30 days
EPSS Percentile
76.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0182 is in the 59th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9ACamera%20Driver%20has%20Out-Of-Bound%20Write%20Vulnerability.md
Broken Link
vul.wangan.com / a/CNVD-2021-49168
Third Party Advisory
allwinnertech.com / index.php
ProductVendor Advisory
cnvd.org.cn / flaw/show/CNVD-2021-49168
Third Party Advisory