---
id: "CVE-2026-98730"
kind: "vulnerability"
aliases: ["CVE-2026-98730"]
title: "Linux kernel: oversized Bluetooth packets overflow an Intel PCIe DMA buffer"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["bluetooth", "intel", "kernel", "laptops", "linux", "runtime"]
not_affected_if: ["driver-not-loaded", "no-intel-pcie-bluetooth"]
published_at: "2026-10-18T16:17:26+00:00"
first_seen_at: "2026-10-23T21:57:16+00:00"
updated_at: "2026-10-25T05:17:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98730", "first_seen_at": "2026-10-23T21:57:16+00:00"}]
---

# Linux kernel: oversized Bluetooth packets overflow an Intel PCIe DMA buffer

The Intel PCIe Bluetooth driver copies outgoing packets into a fixed 4096-byte DMA buffer without checking their length, so an oversized packet overflows it. A local user-space process with HCI user-channel access can trigger the overflow, which can corrupt kernel memory.

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

## How to check

- Run `uname -r` and compare against the kernel build that contains the btintel_pcie fix; the sources do not list fixed versions, so unknown
- Check whether the `btintel_pcie` module is loaded with `lsmod | grep btintel_pcie`

## Fix

- Update the Linux kernel to a release that includes the upstream fix rejecting packets larger than BTINTEL_PCIE_BUFFER_SIZE minus BTINTEL_PCIE_HCI_TYPE_LEN; the exact version is unknown from the sources

## Timeline

- 2026-10-23T21:57:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98730

## From the sources

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

Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()

btintel_pcie_send_frame() eventually copies skb->data into a fixed
BTINTEL_PCIE_BUFFER_SIZE (4096) DMA buffer via memcpy() in
btintel_pcie_prepare_tx(), with a 4-byte PCIe type header prepended.
A user-space process with HCI_CHANNEL_USER access can inject an
oversized packet and overflow the buffer.

Reject packets larger than
BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN on entry.

---

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