CVE-2023-35666

Local privilege escalation via null browse-packet dispatch

Published Sep 11, 2023 · Updated Sep 26, 2024

Privilege escalation in Android Bluetooth on Android 11, 12, 12L, and 13 allows local users to gain elevated access via AVRCP message handling. The bta_av_rc_msg function passes a null browse packet to bta_av_rc_free_browse_msg instead of checking the opcode and packet pointer before dispatch. Google's patch analysis states that this path terminates the Bluetooth process rather than using freed memory; exploitation requires no user interaction.

CVSS severity7.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Android Bluetooth on Android 11, 12, 12L, and 13 allows local users to gain elevated access via AVRCP message handling. The bta_av_rc_msg function passes a null browse packet to bta_av_rc_free_browse_msg instead of checking the opcode and packet pointer before dispatch. Google's patch analysis states that this path terminates the Bluetooth process rather than using freed memory; exploitation requires no user interaction.

The record

CVE
CVE-2023-35666
Published
Sep 11, 2023
Updated
Sep 26, 2024
Vendor
Google
Product
Android
Classifications
CWE-416, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=12
  3. Affected versionversion=12l
  4. Affected versionversion=12L
  5. Affected versionversion=13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google · Androidversion=11; version=12; version=12l; version=12L; version=13

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1404Exploitation for Privilege Escalation

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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