CVE-2021-38783Network attack vector

System crash or privilege escalation via camera IOCTLs

Published Jan 18, 2022 · Updated Aug 4, 2024

Out-of-bounds write in the Allwinner R818 Android Q SDK 1.0 camera driver allows attackers to crash the system or elevate privileges. The /dev/cedar_dev handlers for IOCTL_SET_PROC_INFO and IOCTL_COPY_PROC_INFO write beyond an intended buffer when processing crafted requests. Access to the device node and the ability to issue those IOCTL requests are required; successful exploitation can stop the system or raise the caller's privileges.

CVSS severity7.5
High
EPSS probability1.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Allwinner R818 Android Q SDK 1.0 camera driver allows attackers to crash the system or elevate privileges. The /dev/cedar_dev handlers for IOCTL_SET_PROC_INFO and IOCTL_COPY_PROC_INFO write beyond an intended buffer when processing crafted requests. Access to the device node and the ability to issue those IOCTL requests are required; successful exploitation can stop the system or raise the caller's privileges.

The record

CVE
CVE-2021-38783
Published
Jan 18, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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