CVE-2023-21108

Remote code execution via freed SDP memory

Published Jun 15, 2023 · Updated Aug 2, 2024

Use-after-free in the System component of Android 11 through 13 allows physically proximate attackers to execute code over Bluetooth. The sdpu_build_uuid_seq function in sdp_discovery.cc accesses freed memory while building an SDP UUID sequence, causing an out-of-bounds write. No authentication or user interaction is required, but Bluetooth HFP support must be enabled; successful exploitation executes code in the affected service context.

CVSS severity8.8
High
EPSS probability0.24%
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 System component of Android 11 through 13 allows physically proximate attackers to execute code over Bluetooth. The sdpu_build_uuid_seq function in sdp_discovery.cc accesses freed memory while building an SDP UUID sequence, causing an out-of-bounds write. No authentication or user interaction is required, but Bluetooth HFP support must be enabled; successful exploitation executes code in the affected service context.

The record

CVE
CVE-2023-21108
Published
Jun 15, 2023
Updated
Aug 2, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-416, T1658
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 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-11 Android-12 Android-12L Android-13

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

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

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-416Use After Free
T1658Exploitation for Client Execution

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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