CVE-2023-21130

Remote code execution via unchecked sync handle

Published Jun 15, 2023 · Updated Dec 18, 2024

An out-of-bounds read in Android 13 Bluetooth allows remote attackers to execute code via crafted periodic advertising sync events. The btm_ble_periodic_adv_sync_lost handler uses MAX_SYNC_TRANSACTION as an array index when no sync handle matches, reading one element past the internal buffer. Bluetooth proximity is required, but no privileges or user interaction are needed; successful exploitation executes code on the device.

CVSS severity9.8
Critical
EPSS probability0.53%
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 read in Android 13 Bluetooth allows remote attackers to execute code via crafted periodic advertising sync events. The btm_ble_periodic_adv_sync_lost handler uses MAX_SYNC_TRANSACTION as an array index when no sync handle matches, reading one element past the internal buffer. Bluetooth proximity is required, but no privileges or user interaction are needed; successful exploitation executes code on the device.

The record

CVE
CVE-2023-21130
Published
Jun 15, 2023
Updated
Dec 18, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125, T1658, T1664
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 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-13

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-13

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1658Exploitation for Client Execution
T1664Exploitation for Initial Access

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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