CVE-2023-20676

Local information disclosure via unchecked WLAN length

Published Apr 6, 2023 · Updated Feb 12, 2025

Out-of-bounds read in MediaTek WLAN software allows local users with System privileges to disclose information without interaction. The WLAN component reads past a buffer boundary because it fails to check the relevant input length before accessing memory. Affected releases are Android 11.0 through 13.0; Yocto 3.1, 3.3, and 4.0; and Linux 4.19 on five listed chipsets, with exploitation requiring existing System privileges.

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

Out-of-bounds read in MediaTek WLAN software allows local users with System privileges to disclose information without interaction. The WLAN component reads past a buffer boundary because it fails to check the relevant input length before accessing memory. Affected releases are Android 11.0 through 13.0; Yocto 3.1, 3.3, and 4.0; and Linux 4.19 on five listed chipsets, with exploitation requiring existing System privileges.

The record

CVE
CVE-2023-20676
Published
Apr 6, 2023
Updated
Feb 12, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, CWE-20
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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

4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
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.

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-20Improper Input Validation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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