CVE-2023-20952

Local information disclosure via SBC offset underflow

Published Mar 24, 2023 · Updated Feb 25, 2025

An out-of-bounds write in Android 11, 12, 12L, and 13 allows local users to disclose information through the Bluetooth SBC path. A2DP_BuildCodecHeaderSbc subtracts from a zero buffer offset, causing integer underflow before passing the resulting out-of-bounds pointer to A2DP_BuildMediaPayloadHeaderSbc. Exploitation needs no additional execution privileges or user interaction, and the documented consequence is limited to local information disclosure.

CVSS severity5.5
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

An out-of-bounds write in Android 11, 12, 12L, and 13 allows local users to disclose information through the Bluetooth SBC path. A2DP_BuildCodecHeaderSbc subtracts from a zero buffer offset, causing integer underflow before passing the resulting out-of-bounds pointer to A2DP_BuildMediaPayloadHeaderSbc. Exploitation needs no additional execution privileges or user interaction, and the documented consequence is limited to local information disclosure.

The record

CVE
CVE-2023-20952
Published
Mar 24, 2023
Updated
Feb 25, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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?

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

  1. Affected versionversion=Android-11 Android-12 Android-12L Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-11 Android-12 Android-12L Android-13

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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