---
id: CVE-2026-74681
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg

  ibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check
  in usbio_bulk_msg() compares it ag…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg

  ibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check
  in usbio_bulk_msg() compares it ag…
severity: none
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74681'
references:
  - url: 'https://git.kernel.org/stable/c/7e22c9f79b200672f3e477421b6c9050d8cf70a5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9ad0164f78b66b0b5eca3a5748cc94dd87e28124'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ebfd1e82ab0a6d26efd9bdd89de899215851f5bf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.09926
ingestedAt: '2026-10-14T13:30:58.535Z'
---

## Overview

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

usb: misc: usbio: check ibuf_len against rxbuf_len in bulk msg

ibuf_len is the bulk IN (receive) buffer size, but the EMSGSIZE check
in usbio_bulk_msg() compares it against txbuf_len — the bulk OUT
endpoint size.  Both are taken independently from different endpoints
in usbio_probe(), so the check is wrong when they differ.

Use rxbuf_len for the IN direction.  This matches the buffer that
actually holds the response data.

## Remediation

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