CVE-2023-28909 json
Integer Overflow Leading to MTU Bypass
published 2025-06-28 16 mo ago modified 2026-06-17 4 mo ago also EUVD-2023-32529
- cvss
- 8.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
A specific flaw exists within the Bluetooth stack of the MIB3 unit. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow when receiving fragmented HCI packets on a channel. An attacker can leverage this vulnerability to bypass the MTU check on a channel with enabled fragmentation. Consequently, this can lead to a buffer overflow in upper layer profiles, which can be used to obtain remote code execution. The vulnerability was originally discovered in Skoda Superb III car with MIB3 infotainment unit OEM part number 3V0035820. The list of affected MIB3 OEM part numbers is provided in the referenced resources.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 16 mo ago
Exploit prediction
0.55% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- i.blackhat.com https://i.blackhat.com/EU-24/Presentations/EU-24-Parnishchev-OverTheAirVW.pdf referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.0 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Preh Car Connect GmbH (JOYNEXT GmbH) Volkswagen MIB3 infotainment system MIB3 OI MQB
Classification
- Weakness
-
- CWE-190 Integer Overflow or Wraparound
References
Sources
- CVE List CVE-2023-28909
- NVD CVE-2023-28909
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