Sony XAV-AX8500 Bluetooth AVCTP Protocol heap-based overflow

Summaryinfo

A vulnerability marked as critical has been reported in Sony XAV-AX8500. This vulnerability affects unknown code of the component Bluetooth AVCTP Protocol Handler. This manipulation causes heap-based overflow. This vulnerability is tracked as CVE-2025-5479. The attack is only possible within the local network. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Sony XAV-AX8500 (the affected version is unknown). Affected by this vulnerability is an unknown code of the component Bluetooth AVCTP Protocol Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Sony XAV-AX8500 Bluetooth AVCTP Protocol Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of 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 AVCTP 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 current process. Was ZDI-CAN-26290.

The advisory is shared at zerodayinitiative.com. This vulnerability is known as CVE-2025-5479 since 06/02/2025. The exploitation appears to be difficult. The attack needs to be initiated within the local network. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/08/2025).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-18882). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Sony

Name

• XAV-AX8500

License

• commercial

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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