---
id: CVE-2026-97929
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usbusx2y: validate URB actual_length in interrupt callback

  i_usx2y_in04_int() processes the interrupt URB data without checking
  urb->actual_length
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usbusx2y: validate URB actual_length in interrupt callback

  i_usx2y_in04_int() processes the interrupt URB data without checking
  urb->actual_length.  A short tran…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c156584999bf15118f523ef6c6fedc5b21f46bd9
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    2770321b358658e0a39fe39ccf6a91ee97a81931
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    8f5ef203abda9dd36b2af473c7b737d544f807bd
  - Linux 2.6.12
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:20.167'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97929'
references:
  - url: 'https://git.kernel.org/stable/c/2770321b358658e0a39fe39ccf6a91ee97a81931'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8f5ef203abda9dd36b2af473c7b737d544f807bd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c156584999bf15118f523ef6c6fedc5b21f46bd9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.886Z'
---

## Overview

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

ALSA: usbusx2y: validate URB actual_length in interrupt callback

i_usx2y_in04_int() processes the interrupt URB data without checking
urb->actual_length.  A short transfer from a malfunctioning device
would cause the handler to process uninitialized heap data from the
kmalloc-allocated in04_buf, which is then copied to the mmap-accessible
ctl_snapshot[] array.

Fix by using kzalloc() for in04_buf to zero-initialize the buffer,
and adding an actual_length check to skip processing on short
transfers while still resubmitting the URB.

## Remediation

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