CVE-2022-21767

Local privilege escalation via unchecked Bluetooth write

Published Jul 6, 2022 · Updated Aug 3, 2024

Heap-based buffer overflow in MediaTek Bluetooth on Android 8.1 through 12.0 allows physically proximate attackers to escalate privileges. The Bluetooth component writes beyond a heap buffer because it processes data without the required bounds check. Exploitation requires Bluetooth proximity but no existing execution privileges or user interaction, and successful abuse gains elevated local privileges.

CVSS severity8.8
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in MediaTek Bluetooth on Android 8.1 through 12.0 allows physically proximate attackers to escalate privileges. The Bluetooth component writes beyond a heap buffer because it processes data without the required bounds check. Exploitation requires Bluetooth proximity but no existing execution privileges or user interaction, and successful abuse gains elevated local privileges.

The record

CVE
CVE-2022-21767
Published
Jul 6, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-122, T1404
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3NIST NVDAV:A/AC:L/Au:N/C:C/I:C/A:C

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
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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