CVE-2023-21196

Local information disclosure via unchecked callback bounds

Published Jun 28, 2023 · Updated Aug 2, 2024

Out-of-bounds read in the Android 13 Bluetooth server allows local users with System execution privileges to disclose server memory. btm_ble_batchscan_filter_track_adv_vse_cback in btm_ble_batchscan.cc reads beyond a buffer because it fails to validate callback data bounds. Exploitation requires System-level code execution on the device, needs no user interaction, and is limited to information disclosure.

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 the Android 13 Bluetooth server allows local users with System execution privileges to disclose server memory. btm_ble_batchscan_filter_track_adv_vse_cback in btm_ble_batchscan.cc reads beyond a buffer because it fails to validate callback data bounds. Exploitation requires System-level code execution on the device, needs no user interaction, and is limited to information disclosure.

The record

CVE
CVE-2023-21196
Published
Jun 28, 2023
Updated
Aug 2, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125, T1005
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 vectorlocal
Required privilegesadmin

What is affected?

Google Cloud · Androidversion=Android-13

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-125Out-of-bounds Read
T1005Data from Local System

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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