CVE-2022-20028

Local privilege escalation via unchecked Bluetooth write

Published Feb 9, 2022 · Updated Aug 3, 2024

Stack-based buffer overflow in MediaTek Bluetooth on Android 8.1 through 12.0 allows local users to escalate privileges without interaction. The Bluetooth component omits a bounds check and writes beyond a stack buffer when processing untrusted input; MediaTek has not disclosed the affected routine or input field. Exploitation requires local low-privileged code on a device using an MT8167, MT8175, MT8183, MT8362A, MT8365, or MT8385 chipset and grants higher execution privileges without user interaction.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in MediaTek Bluetooth on Android 8.1 through 12.0 allows local users to escalate privileges without interaction. The Bluetooth component omits a bounds check and writes beyond a stack buffer when processing untrusted input; MediaTek has not disclosed the affected routine or input field. Exploitation requires local low-privileged code on a device using an MT8167, MT8175, MT8183, MT8362A, MT8365, or MT8385 chipset and grants higher execution privileges without user interaction.

The record

CVE
CVE-2022-20028
Published
Feb 9, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1404
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 9, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
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-787Out-of-bounds Write
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo