CVE-2023-20709

Local memory disclosure via missing bounds check

Published May 15, 2023 · Updated Jan 24, 2025

Improper input validation in MediaTek keyinstall on Android 11.0, 12.0, and 13.0 allows local users to read memory outside its buffer. The component reads beyond the intended buffer because it fails to check a supplied quantity against the available bounds before accessing data. Exploitation requires System execution privileges and no user interaction, and the reported consequence is limited to confidentiality.

CVSS severity4.4
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in MediaTek keyinstall on Android 11.0, 12.0, and 13.0 allows local users to read memory outside its buffer. The component reads beyond the intended buffer because it fails to check a supplied quantity against the available bounds before accessing data. Exploitation requires System execution privileges and no user interaction, and the reported consequence is limited to confidentiality.

The record

CVE
CVE-2023-20709
Published
May 15, 2023
Updated
Jan 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, CWE-1284, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 24, 2025Record 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 vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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.

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No observations available

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

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-1284Improper Validation of Specified Quantity in Input
T1005Data from Local System

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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