---
id: CVE-2025-22108
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bnxt_en: Mask the bd_cnt field in the TX BD properly

  The bd_cnt field in the TX BD specifies the total number of BDs for
  the TX packet
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bnxt_en: Mask the bd_cnt field in the TX BD properly

  The bd_cnt field in the TX BD specifies the total number of BDs for
  the TX packet.  The bd_cnt field has 5 bits an…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.4, < 6.14.2'
patched:
  - linux_kernel 6.14.2
published: '2025-04-16'
updated: '2026-09-07'
sourceUpdated: '2026-09-07T16:17:27.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-22108'
references:
  - url: 'https://git.kernel.org/stable/c/107b25db61122d8f990987895c2912927b8b6e3f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9ee185e0f15594017a6f1a191ebe6630cfea5f74'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f60b41b815826f15c4d0323f923f398c423178d0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00362
epssPercentile: 0.27311
ingestedAt: '2026-09-07T17:14:49.477Z'
---

## Overview

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

bnxt_en: Mask the bd_cnt field in the TX BD properly

The bd_cnt field in the TX BD specifies the total number of BDs for
the TX packet.  The bd_cnt field has 5 bits and the maximum number
supported is 32 with the value 0.

CONFIG_MAX_SKB_FRAGS can be modified and the total number of SKB
fragments can approach or exceed the maximum supported by the chip.
Add a macro to properly mask the bd_cnt field so that the value 32
will be properly masked and set to 0 in the bd_cnd field.

Without this patch, the out-of-range bd_cnt value will corrupt the
TX BD and may cause TX timeout.

The next patch will check for values exceeding 32.

## Affected

- `linux_kernel >= 6.4, < 6.14.2`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.14.2`