---
id: CVE-2026-97976
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: btintel_pcie: validate packet_len before skb_put_data

  btintel_pcie_submit_rx_work() reads packet_len from rfh_hdr without
  checking if it exceeds the RX buff…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: btintel_pcie: validate packet_len before skb_put_data

  btintel_pcie_submit_rx_work() reads packet_len from rfh_hdr without
  checking if it exceeds the RX buff…
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c2b636b3f788d10486a6691ad6dd3ec4c93bd78e <
    ab0159b1f7214ce9bad9862751e4553e635a21b1
  - >-
    Linux >= c2b636b3f788d10486a6691ad6dd3ec4c93bd78e <
    73a50c636425cb9f7ab647b5a97bd14dd5610076
  - >-
    Linux >= c2b636b3f788d10486a6691ad6dd3ec4c93bd78e <
    46884c0f92708f1d218fc94d88800227a19b52f8
  - >-
    Linux >= c2b636b3f788d10486a6691ad6dd3ec4c93bd78e <
    6436e1b5331b1aebf905c13e0880a37032719b75
  - Linux 6.10
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:25.570'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97976'
references:
  - url: 'https://git.kernel.org/stable/c/46884c0f92708f1d218fc94d88800227a19b52f8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6436e1b5331b1aebf905c13e0880a37032719b75'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/73a50c636425cb9f7ab647b5a97bd14dd5610076'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ab0159b1f7214ce9bad9862751e4553e635a21b1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97976.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97976'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541173'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97976'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97976'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97976.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-25T11:06:38.870Z'
epss: 0.00168
epssPercentile: 0.06034
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-125
---

## Overview

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

Bluetooth: btintel_pcie: validate packet_len before skb_put_data

btintel_pcie_submit_rx_work() reads packet_len from rfh_hdr without
checking if it exceeds the RX buffer size. An oversized packet_len
can lead to an out-of-bounds read in skb_put_data().

Validate packet_len to ensure it is non-zero and does not exceed
BTINTEL_PCIE_BUFFER_SIZE - sizeof(*rfh_hdr), logging an error when
invalid.

This issue was reported by Claude Mythos. It can be simulated either by
using customized firmware configured to return an invalid packet_len or
by modifying rfh_hdr->packet_len in the driver before calling
btintel_pcie_submit_rx_work().

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97976.json)