CVE-2023-28911

Bluetooth channel interruption via unchecked peer address

Published Jun 28, 2025 · Updated Jun 30, 2025

Improper input validation in MIB3 OI MQB firmware 0304 and earlier allows physically proximate attackers to interrupt Bluetooth channels. The L2CAP_ProcessSignalReq function checks supplied local and remote channel identifiers without verifying that the sender's BD_ADDR owns the target channel. An unauthenticated device within Bluetooth range can brute-force an established channel's identifier pair and disconnect clients other than itself.

CVSS severity6.5
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in MIB3 OI MQB firmware 0304 and earlier allows physically proximate attackers to interrupt Bluetooth channels. The L2CAP_ProcessSignalReq function checks supplied local and remote channel identifiers without verifying that the sender's BD_ADDR owns the target channel. An unauthenticated device within Bluetooth range can brute-force an established channel's identifier pair and disconnect clients other than itself.

The record

CVE
CVE-2023-28911
Published
Jun 28, 2025
Updated
Jun 30, 2025
Vendor
JOYNEXT GmbH
Product
JOYNEXT MIB3 OI MQB
Classifications
CWE-20, CAPEC-216, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <=0304

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

JOYNEXT GmbH · JOYNEXT MIB3 OI MQBversion=0 <=0304

Published CVSS scores

6.5Automotive Security Research GroupCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-20Improper Input Validation
CAPEC-216Communication Channel Manipulation
T1499Endpoint Denial of Service

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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