CVE-2023-40088

Unauthenticated adjacent code execution via stale JNI environment

Published Dec 4, 2023 · Updated Aug 2, 2024

Use-after-free in the Bluetooth System component in Google Android 11 through 14 allows physically proximate attackers to execute code. In callback_thread_event, com_android_bluetooth_btservice_AdapterService.cpp detaches a thread but leaves its freed JNI environment pointer non-null, allowing later reuse. Bluetooth proximity is required; exploitation needs no privileges or user interaction and can compromise the affected device.

CVSS severity8.8
High
EPSS probability1.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Bluetooth System component in Google Android 11 through 14 allows physically proximate attackers to execute code. In callback_thread_event, com_android_bluetooth_btservice_AdapterService.cpp detaches a thread but leaves its freed JNI environment pointer non-null, allowing later reuse. Bluetooth proximity is required; exploitation needs no privileges or user interaction and can compromise the affected device.

The record

CVE
CVE-2023-40088
Published
Dec 4, 2023
Updated
Aug 2, 2024
Vendor
Google
Product
Android
Classifications
CWE-416, T1664
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 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=11
  2. Affected versionversion=11.0
  3. Affected versionversion=12
  4. Affected versionversion=12.0
  5. Affected versionversion=12l
  6. Affected versionversion=12L
  7. Affected versionversion=13
  8. Affected versionversion=13.0
  9. Affected versionversion=14
  10. Affected versionversion=14.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Google · Androidversion=11; version=11.0; version=12; version=12.0; version=12l; version=12L; version=13; version=13.0; version=14; version=14.0

Published CVSS scores

8.8CISACVSS:3.1/AV:A/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.

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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