---
id: "CVE-2026-98460"
kind: "vulnerability"
aliases: ["CVE-2026-98460"]
title: "Linux kernel: Bluetooth raw sockets can alias reserved commands past filter"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["bluetooth", "infrastructure", "kernel", "linux"]
not_affected_if: []
published_at: "2026-10-18T16:16:56+00:00"
first_seen_at: "2026-10-23T21:57:15+00:00"
updated_at: "2026-10-25T05:27:14+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98460", "first_seen_at": "2026-10-23T21:57:15+00:00"}]
---

# Linux kernel: Bluetooth raw sockets can alias reserved commands past filter

The Linux kernel's raw HCI Bluetooth socket security filter masks the 10-bit opcode to 7 bits, so a reserved command can alias an allowlisted one. An unprivileged local socket user may thereby send Bluetooth controller commands the filter was meant to block.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98460

## From the sources

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sock: reject out-of-range OCF values

The raw HCI socket security filter has 128 OCF bits per supported OGF,
but masks the 10-bit OCF with 127 before looking up the command. An
unprivileged socket can therefore submit a reserved OCF that aliases an
allowlisted command modulo 128.

A conforming controller should reject reserved opcodes. Nevertheless,
the security decision must apply to the opcode that will actually be
sent, especially since controller-specific behavior is outside the host
stack's control.

Reject OCF values that cannot be represented by the security filter
instead of aliasing them onto an unrelated command.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_