CVE-2025-32061 is a stack-based buffer overflow vulnerability classified under CWE-121, found in the Bluetooth stack developed by Alps Alpine integrated into Bosch Infotainment system ECUs. The flaw results from inadequate boundary checks on user-supplied data received over the upper layer L2CAP channel, a protocol used for Bluetooth communication. When a specially crafted packet is sent to the vulnerable ECU, it can overflow the stack buffer, corrupting memory and enabling an attacker to execute arbitrary code remotely with root privileges. This vulnerability does not require prior authentication or user interaction, increasing its risk profile. The affected product version identified is 283C30861E, and the vulnerability was first discovered in the Nissan Leaf ZE1 model from 2020, indicating its presence in electric vehicles. The CVSS 3.1 score is 8.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and no privileges or user interaction required. Although no exploits have been observed in the wild yet, the potential for remote code execution on critical vehicle components poses a significant threat to vehicle control and passenger safety. The lack of available patches at the time of reporting necessitates immediate attention to network segmentation and Bluetooth access controls to mitigate risk.

The vulnerability allows remote attackers to gain root-level code execution on the Infotainment ECU, which can lead to full compromise of the vehicle's infotainment system. This can impact confidentiality by exposing sensitive user data stored or processed by the infotainment system, including personal information and location data. Integrity can be compromised by allowing attackers to alter system behavior or inject malicious code, potentially affecting vehicle functions tied to the infotainment ECU. Availability is also at risk, as exploitation could cause system crashes or denial of service, impairing critical vehicle operations. Given the ECU's integration with vehicle systems, this could escalate to broader vehicle control issues, posing safety risks to passengers. The ease of exploitation without authentication or user interaction increases the threat level, especially in environments where Bluetooth connectivity is accessible. The scope includes all vehicles equipped with the vulnerable Bosch Infotainment ECU version, notably certain Nissan Leaf ZE1 models, but potentially others using the same hardware and software stack. This vulnerability could undermine consumer trust and lead to regulatory scrutiny in the automotive sector.

1. Immediate implementation of network-level controls to restrict Bluetooth access to trusted devices only, including disabling Bluetooth when not in use. 2. Deploy intrusion detection systems (IDS) or anomaly detection tailored to Bluetooth traffic to identify and block suspicious packets targeting the L2CAP channel. 3. Coordinate with Bosch and vehicle manufacturers for timely release and application of security patches or firmware updates addressing this vulnerability. 4. For fleet operators, conduct comprehensive audits of vehicle infotainment systems to identify affected units and isolate them from external Bluetooth connections until patched. 5. Educate users on minimizing Bluetooth exposure, such as turning off discoverable mode and avoiding pairing with unknown devices. 6. Implement layered security controls within vehicle networks to prevent lateral movement from compromised infotainment ECUs to other critical vehicle systems. 7. Monitor security advisories from Bosch, Alps Alpine, and automotive cybersecurity organizations for updates and exploit reports. 8. Consider deploying endpoint protection solutions capable of monitoring ECU behavior for signs of compromise. These measures go beyond generic advice by focusing on Bluetooth-specific controls, proactive detection, and coordination with vendors for patch management.