CVE-2023-21356

Code execution via unchecked Bluetooth buffer write

Published Oct 30, 2023 · Updated Aug 2, 2024

Out-of-bounds write in Google Android 14 Bluetooth allows physically proximate attackers to execute arbitrary code without user interaction. The Bluetooth component processes proximal input without the required bounds check, allowing a write past the destination buffer. Bluetooth proximity and reachability are required, but no execution privileges or user action is needed; successful exploitation executes code in the affected component.

CVSS severity8.8
High
EPSS probability0.15%
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 write in Google Android 14 Bluetooth allows physically proximate attackers to execute arbitrary code without user interaction. The Bluetooth component processes proximal input without the required bounds check, allowing a write past the destination buffer. Bluetooth proximity and reachability are required, but no execution privileges or user action is needed; successful exploitation executes code in the affected component.

The record

CVE
CVE-2023-21356
Published
Oct 30, 2023
Updated
Aug 2, 2024
Vendor
Google
Product
Android
Classifications
CWE-787, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 30, 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=14

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Google · Androidversion=14

Published CVSS scores

8.8NIST NVDCVSS: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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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