# CVE-2026-18278: Sony XAV-9500ES out-of-bounds read in Bluetooth L2CAP handler

Source: https://junglewise.ai/threats/cve-2026-18278-sony-xav-9500es-out-of-bounds-read-in-bluetooth-l2cap-handler  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-18278 · Severity: low · CVSS 3.5 · Published 2026-08-20

Sony XAV-9500ES is an in-car multimedia receiver with Bluetooth connectivity. A vulnerability in its Bluetooth packet handling allows an attacker who has paired a malicious Bluetooth device to read sensitive data from device memory. While the reported severity is low, this flaw could be chained with other vulnerabilities to gain control of the device.

Technologies: [Sony XAV-9500ES](https://junglewise.ai/threats/technologies/xav-9500es). Vendors: [Sony](https://junglewise.ai/threats/vendors/sony).

## Quick answers

**Is CVE-2026-18278 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18278 being exploited in the wild.

**How severe is CVE-2026-18278?** Low severity, with a CVSS score of 3.5, published 20 August 2026.

**Which products and versions are affected?** Sony XAV-9500ES Not specified.

**Is there a fix for CVE-2026-18278?** A patch was published on 2026-07-29: Sony released an update Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-18278 attacked?** It is attacked from the adjacent network.

**Am I affected by CVE-2026-18278?** Check whether you run Sony XAV-9500ES at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is an out-of-bounds read vulnerability in the prh_l2_decode_packet function that handles Bluetooth L2CAP (Logical Link Control and Adaptation Protocol) packets. The root cause is insufficient validation of user-supplied packet data, allowing reads past allocated buffer boundaries. Exploitation requires an attacker to first pair a malicious Bluetooth device with the target XAV-9500ES system, making this a network-adjacent attack. An attacker can leverage this information disclosure in combination with other vulnerabilities to achieve arbitrary code execution on the device. Sony has issued a patch to address this flaw.

## Affected products

- Sony XAV-9500ES Not specified

## Timeline

- 2026-03-19: disclosed: Vulnerability reported to vendor
- 2026-07-29: advisory: Coordinated public release of advisory ZDI-26-471
- 2026-07-29: patched: Sony released an update

## References

- [https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-9500es/software/00274922](https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-9500es/software/00274922)
- [https://www.zerodayinitiative.com/advisories/ZDI-26-471/](https://www.zerodayinitiative.com/advisories/ZDI-26-471/)

## Related threats

- [Sony XAV-9500ES crash dump handler command injection](https://junglewise.ai/threats/cve-2026-18284-sony-xav-9500es-crash-dump-handler-command-injection)
- [Sony XAV-9500ES udev USB Rules authorization bypass](https://junglewise.ai/threats/cve-2026-18283-sony-xav-9500es-udev-usb-rules-authorization-bypass)
- [Sony XAV-9500ES heap buffer overflow in AVRCP packet handling](https://junglewise.ai/threats/cve-2026-18282-sony-xav-9500es-heap-buffer-overflow-in-avrcp-packet-handling)
- [Sony XAV-9500ES heap buffer overflow in L2CAP packet handling](https://junglewise.ai/threats/cve-2026-18281-sony-xav-9500es-heap-buffer-overflow-in-l2cap-packet-handling)
- [Sony XAV-9500ES gpsd buffer overflow arbitrary code execution](https://junglewise.ai/threats/cve-2026-18280-sony-xav-9500es-gpsd-buffer-overflow-arbitrary-code-execution)