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Alpine iLX-F511 CVE-2026-118611

| EUVDEUVD-2026-112206 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-10-28 zdi GHSA-7788-fh62-29rr
6.8
CVSS 3.0 · Vendor: zdi
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Approach device within Bluetooth range
  2. Delivery
    Establish OBEX connection
  3. Exploit
    Send oversized OBEX packet
  4. Execution
    Overflow heap buffer via unvalidated length
  5. Impact
    Execute arbitrary code as root

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires Bluetooth-OBEX proximity to the Alpine iLX-F511 head unit (CVSS AV:P / 'physically present attackers'): the attacker must be within Bluetooth range of a device that is discoverable/pairable and reachable over the OBEX profile, then send an OBEX packet carrying user-supplied data longer than the device validates before copying it into a heap buffer. No authentication (PR:N) and no user interaction (UI:N) are needed once in range. The primary limiting factor is the physical/proximity access requirement - there is no network-remote path - which prevents large-scale remote exploitation; affected version per EUVD is iLX-F511 7.0.000.

Impact

The decisive mitigating signal is the CVSS attack vector AV:P (physical), reflected in the description's explicit 'physically present attackers' language: exploitation requires Bluetooth-OBEX proximity to the target Alpine iLX-F511 head unit, not remote internet reach, which is why the base score lands at only 6.8 despite C:H/I:H/A:H and code execution as root. Per CVSS the flaw is unauthenticated (PR:N) with low complexity (AC:L) and no user interaction (UI:N), so an attacker within Bluetooth range of a reachable/pairable device faces few obstacles. No EPSS probability was provided, the vulnerability is NOT on the CISA KEV list, and no public exploit was identified - only the ZDI advisory reference, which is not exploit code. The vuln.today decision label is 'this_month' rather than act_now/emergency, consistent with a serious but physically-gated issue. Net: this is a genuine high-impact RCE (root) but the physical/proximity access requirement sharply limits real-world mass exploitation; treat it as a prioritized patch item for affected fleets, not a drop-everything emergency. Note: the term 'remote code execution' in the title conflicts with the AV:P physical vector and the 'physically present attackers' wording - the realistic access model is Bluetooth proximity, not network-remote; verify range/pairing prerequisites with the vendor.

Exploit ScenarioDerived

An attacker within Bluetooth range of a targeted Alpine iLX-F511 in-vehicle head unit connects via OBEX and sends a crafted packet whose user-supplied data exceeds the length the device validates, overflowing a heap buffer. Because the vulnerable code runs as root and no authentication is required, successful exploitation yields arbitrary code execution with full privileges on the device. No public proof-of-concept or exploit code was identified at the time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet

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AnalysisAIv1 – Oct 28, 2026

A heap-based buffer overflow in the Bluetooth OBEX packet handling of the Alpine iLX-F511 in-car head unit (version 7.0.000 per EUVD) lets an attacker within Bluetooth range send an over-long OBEX payload that is copied into a heap buffer without adequate length validation, resulting in arbitrary code execution with root privileges. No authentication or user interaction is required, but the CVSS vector is AV:P and the vendor description explicitly limits the threat to physically present attackers, so the practical constraint is Bluetooth-OBEX proximity to a discoverable/pairable unit rather than internet reachability - which is why the base score sits at 6.8 despite high confidentiality, integrity and availability impact. No CISA KEV entry and no public exploit code were identified at time of analysis; the finding was reported through the Zero Day Initiative (ZDI-CAN-29012 / ZDI-26-829) and vuln.today prioritizes it as this_month.

RemediationAI

No vendor-released patch version is identified in the available data; the only published reference is the ZDI advisory ZDI-26-829 (https://www.zerodayinitiative.com/advisories/ZDI-26-829/), which should be checked for Alpine's fixed firmware release and installation guidance before updating affected iLX-F511 units, and the upstream vendor should be consulted for the corrected firmware build for the 7.0.000 branch. Because the attack surface is the Bluetooth OBEX profile, the actionable interim control is to reduce exposure of the head unit's Bluetooth interface: disable Bluetooth on the unit when it is not needed, and turn off discoverability/pairing mode and remove or avoid pairing with untrusted devices, accepting that this degrades hands-free and audio-streaming functionality; keep the vehicle cabin and unit physically inaccessible to untrusted persons while the radio is powered, since AV:P reflects the requirement to be within Bluetooth range. These measures lower likelihood only - the underlying heap overflow is not removed until fixed firmware from Alpine is applied.

Affected VersionsENISA

iLX-F511 7.0.000

Affected Packages

euvd ilx_f511 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The flaw is a classic CWE-122 heap-based buffer overflow in the Bluetooth OBEX (Object Exchange) profile implementation on the Alpine iLX-F511. OBEX is the session protocol used for object push and file-transfer style operations over Bluetooth, and the advisory states the specific defect exists within the handling of Bluetooth OBEX packets: user-supplied data is copied into a heap-allocated buffer without proper validation of its length first. Because the write occurs past the bounds of a heap allocation, an attacker who can deliver a crafted OBEX packet can corrupt heap metadata and adjacent objects and redirect execution, and the description states the resulting code runs in the context of root on the head unit. The affected product is captured by the CPE cpe:2.3:a:alpine:ilx-f511:*:*:*:*:*:*:*:* and by EUVD-2026-112206, which pins the affected release to iLX-F511 firmware 7.0.000. The CVSS 3.1 vector AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H describes the constraint accurately: the attack path is physical/proximity (Bluetooth range) rather than a routed network service, but once a reachable OBEX peer is available the attack is low-complexity, requires no credentials and no user action. The trigger mechanics beyond 'an over-length OBEX packet copied to a heap buffer' are not described in the available sources.

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Severity by source

Vendor (zdi) PRIMARY 6.8 MEDIUM
AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 6.8 MEDIUM

Bluetooth-proximity/physical access gives AV:P, no auth or interaction (PR:N/UI:N), low complexity, and root-level code execution yields full C:H/I:H/A:H on an unchanged scope.

3.1 AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (zdi).

CVSS VectorVendor: zdi

Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Alpine iLX-F511 Bluetooth OBEX Packet Handling Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Alpine iLX-F511 devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of Bluetooth OBEX packets. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-29012.

Threat Intelligence Overview

Prevalence
Low
aftermarket car head unit, niche consumer automotive electronics footprint
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS N/A
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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