---
id: "CVE-2026-99094"
kind: "vulnerability"
aliases: ["CVE-2026-99094"]
title: "Linux kernel: Bluetooth Intel PCIe driver TX descriptor bounds check flaw"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["bluetooth", "infrastructure", "intel-pcie", "linux-kernel"]
not_affected_if: ["no-intel-pcie-bluetooth"]
published_at: "2026-10-26T15:16:48+00:00"
first_seen_at: "2026-10-26T16:02:26+00:00"
updated_at: "2026-10-26T16:04:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99094", "first_seen_at": "2026-10-26T16:02:26+00:00"}]
---

# Linux kernel: Bluetooth Intel PCIe driver TX descriptor bounds check flaw

The Intel PCIe Bluetooth driver in the Linux kernel used a transmit descriptor index that could equal the queue size, reading one entry past the end of the arrays. The sources do not state what an attacker gains from this out-of-bounds access.

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

## How to check

- `uname -r` to see the running kernel version
- `lspci | grep -i bluetooth` to check whether an Intel PCIe Bluetooth controller is present
- unknown whether the sources list affected kernel versions

## Fix

- Update to a Linux kernel release that includes the btintel_pcie bounds check fix; the sources do not name the fixed version
- unknown whether a distribution kernel package already carries the fix

## Timeline

- 2026-10-26T16:02:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-99094

## From the sources

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

Bluetooth: btintel_pcie: fix TX descriptor bounds check

btintel_pcie_prepare_tx() uses tfd_index to access the TFD and data
buffer arrays before the index is advanced modulo txq->count. An index
equal to txq->count is one past the end of both arrays, so reject it in
the bounds check.

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