CVE-2021-0636Network attack vector

Code execution via unchecked AVI array size

Published Oct 6, 2021 · Updated Aug 3, 2024

Memory corruption in the UNISOC Video Driver on Android 10 through 12 allows attackers to execute code via a malformed AVI file. The kernel video driver's AVI extraction path uses an array without checking its size, corrupting memory when malformed file data exceeds expected bounds. Exploitation requires the device to process attacker-supplied AVI content; successful corruption can crash video playback or execute code with the driver's privileges.

CVSS severity7.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the UNISOC Video Driver on Android 10 through 12 allows attackers to execute code via a malformed AVI file. The kernel video driver's AVI extraction path uses an array without checking its size, corrupting memory when malformed file data exceeds expected bounds. Exploitation requires the device to process attacker-supplied AVI content; successful corruption can crash video playback or execute code with the driver's privileges.

The record

CVE
CVE-2021-0636
Published
Oct 6, 2021
Updated
Aug 3, 2024
Vendor
UNISOC
Product
UNISOC Video Driver
Classifications
CWE-119, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Android SoC

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

UNISOC · UNISOC Video Driverversion=Android SoC

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.1UNISOCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L/E:F/RC:C
7.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1204.002User Execution: Malicious File

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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