CVE-2023-28905Known exploitationPublic exploit

Code execution via undersized JPEG scanline buffer

Published Jun 28, 2025 · Updated Jun 30, 2025

Heap buffer overflow in JOYNEXT MIB3 OI MQB through 0304 allows attackers to execute code via a crafted Bluetooth contact photo. The phone-contact service allocates a 0x4000-byte scanline_buffer, but jpeg_read_scanlines can write as many as 0x7FFF bytes while scaling a wide JPEG. Bluetooth pairing and contact synchronization are required, and successful exploitation runs code as the unprivileged phone user.

CVSS severity8.0
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in JOYNEXT MIB3 OI MQB through 0304 allows attackers to execute code via a crafted Bluetooth contact photo. The phone-contact service allocates a 0x4000-byte scanline_buffer, but jpeg_read_scanlines can write as many as 0x7FFF bytes while scaling a wide JPEG. Bluetooth pairing and contact synchronization are required, and successful exploitation runs code as the unprivileged phone user.

The record

CVE
CVE-2023-28905
Published
Jun 28, 2025
Updated
Jun 30, 2025
Vendor
JOYNEXT GmbH
Product
JOYNEXT MIB3 OI MQB
Classifications
CWE-122, CAPEC-100, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 2024Exploitation reportedMIB3 Bluetooth-to-persistence exploit chain
  2. Jun 28, 2025CVE publishedPublication date reported by the CVE source.
  3. 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?

Compare these published version ranges with your installed build and any vendor patches.

  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

8.0Automotive Security Research Group CNACVSS:3.1/AV:A/AC:L/PR:N/UI:R/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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CAPEC-100Overflow Buffers
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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