---
id: CVE-2026-46184
title: 'sound: ua101: fix division by zero at probe'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  sound: ua101: fix division by zero at probe

  Add a missing sanity check for bNrChannels in detect_usb_format()
  to prevent a division by zero in playback_urb_complete() …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    e02897c5b041c9b980055fa9a6167023d6dc5caf
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    aae1498c59f48d03ee358df84f07a5af9885f827
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    66d9c2ed081f299cfb201d9e9c4faf920e56e0bf
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    6162e8212e88c39492d981b248b5e37002486c66
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    593dd7e6c890d8e4ca21b3e2f796b7cb8e8da983
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    0ff2b713f406e9ecadb406014d74e7a020ac12b1
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    f1862dbf09080254c52175a448290c784dd7d3de
  - >-
    Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 <
    d1f73f169c1014463b5060e3f60813e13ddc7b87
  - Linux 2.6.34
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:11:26.887350Z'
published: '2026-05-28'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:13:43.607Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-46184'
references:
  - url: 'https://git.kernel.org/stable/c/e02897c5b041c9b980055fa9a6167023d6dc5caf'
  - url: 'https://git.kernel.org/stable/c/aae1498c59f48d03ee358df84f07a5af9885f827'
  - url: 'https://git.kernel.org/stable/c/66d9c2ed081f299cfb201d9e9c4faf920e56e0bf'
  - url: 'https://git.kernel.org/stable/c/6162e8212e88c39492d981b248b5e37002486c66'
  - url: 'https://git.kernel.org/stable/c/593dd7e6c890d8e4ca21b3e2f796b7cb8e8da983'
  - url: 'https://git.kernel.org/stable/c/0ff2b713f406e9ecadb406014d74e7a020ac12b1'
  - url: 'https://git.kernel.org/stable/c/f1862dbf09080254c52175a448290c784dd7d3de'
  - url: 'https://git.kernel.org/stable/c/d1f73f169c1014463b5060e3f60813e13ddc7b87'
tags:
  - cve.org
epss: 0.00128
epssPercentile: 0.02467
ingestedAt: '2026-11-06T16:57:43.326Z'
---

## Overview

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

sound: ua101: fix division by zero at probe

Add a missing sanity check for bNrChannels in detect_usb_format()
to prevent a division by zero in playback_urb_complete() and
capture_urb_complete().

USB core does not validate class-specific descriptor fields such
as bNrChannels, so drivers must verify them before use. If a
device provides bNrChannels = 0, frame_bytes becomes zero and is
later used as a divisor in the URB completion handlers, leading
to a kernel crash.

## Affected

- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < e02897c5b041c9b980055fa9a6167023d6dc5caf`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < aae1498c59f48d03ee358df84f07a5af9885f827`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < 66d9c2ed081f299cfb201d9e9c4faf920e56e0bf`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < 6162e8212e88c39492d981b248b5e37002486c66`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < 593dd7e6c890d8e4ca21b3e2f796b7cb8e8da983`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < 0ff2b713f406e9ecadb406014d74e7a020ac12b1`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < f1862dbf09080254c52175a448290c784dd7d3de`
- `Linux >= 63978ab3e3e963db28093b53bb4598f2702e1ad7 < d1f73f169c1014463b5060e3f60813e13ddc7b87`
- `Linux 2.6.34`

## Remediation

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