(Pwn2Own) Sony XAV-9500ES prh_l2_decode_packet Out-Of-Bounds Read Information Disclosure Vulnerability

July 29th, 2026
ZDI-26-471 ZDI-CAN-28990

CVE ID

CVE-2026-18278

CVSS Score

3.5 AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected Vendors

Sony

Affected Products

XAV-9500ES

Vulnerability Details

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Sony XAV-9500ES 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 handling of Bluetooth L2CAP packets. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the device.

Additional Details

Sony has issued an update to correct this vulnerability. More details can be found at:
https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-9500es/software/00274922

Disclosure Timeline

  • 2026-03-19 - Vulnerability reported to vendor
  • 2026-07-29 - Coordinated public release of advisory
  • 2026-07-29 - Advisory Updated

Credit

@ExLuck99 and @gr4ss341 of ANHTUD

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