CVE-2025-5477 Sony XAV-AX8500 Bluetooth L2CAP Protocol Heap-based Buffer Overflow Remote Code Execution Vulnerability

High 7.5 Published 21 Jun 2025 Updated 23 Jun 2025

Network-adjacent attackers can execute arbitrary code on Sony XAV-AX8500 devices via a heap-based buffer overflow in the Bluetooth L2CAP protocol.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-5477?

CVE-2025-5477 is a high-severity memory corruption vulnerability in Sony XAV-AX8500, published on 21 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Sony XAV-AX8500 Bluetooth L2CAP Protocol Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected Sony XAV-AX8500 devices. An attacker must first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit this vulnerability.

The specific flaw exists within the implementation of the Bluetooth L2CAP protocol. 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 the elysian-bt-service process. Was ZDI-CAN-26286.

Weakness: CWE-122

Which versions are affected by CVE-2025-5477?

It affects 1 product.

Products include Sony Xav-Ax8500 Firmware.

How do I fix CVE-2025-5477?

No fix has been published for CVE-2025-5477 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-5477 being exploited?

There is no known exploitation of CVE-2025-5477 in the wild and no public exploit code.

Sources

Also known as GHSA-g2j4-v7hf-2xq4.