---
id: CVE-2026-46146
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

  The convert_chmap_v3() has a loop with its increment size of
  cs_desc->wLength, but we forgot to val…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

  The convert_chmap_v3() has a loop with its increment size of
  cs_desc->wLength, but we forgot to val…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-835
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.4.297, < 5.5'
  - 'linux_kernel >= 5.10.241, < 5.10.258'
  - 'linux_kernel >= 5.15.190, < 5.15.209'
  - 'linux_kernel >= 6.1.149, < 6.1.175'
  - 'linux_kernel >= 6.6.103, < 6.6.140'
  - 'linux_kernel >= 6.12.43, < 6.12.88'
  - 'linux_kernel >= 6.15.11, < 6.16'
  - 'linux_kernel >= 6.16.2, < 6.17'
  - 'linux_kernel >= 6.17.1, < 6.18.30'
  - 'linux_kernel >= 6.19, < 7.0.7'
  - linux_kernel = 6.17
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.7
published: '2026-05-28'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:46.427'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46146'
references:
  - url: 'https://git.kernel.org/stable/c/076d5d13eb9c1ad259a7f246149f6676c62285f9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/24a40df79307ca7ca0eec0889361cf6ac146d72a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/316aa0b1e3c5600eae5ab876394c1ac70e6db581'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4e0ee232ebe3df04874125d7c7f3e6c25ea5483d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e7247d8f5fefeceb0bb9cc80a5388a636b219cd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be09b47ed8677d76962e3240c145502e2ad9f3c8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e0e3dcf48189603f3865f1a0b799b3b42baae96d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fa5b19ce69067874b1413f3c2027563bae8c2cb3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-784472.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00162
epssPercentile: 0.05031
ingestedAt: '2026-10-15T03:30:12.890Z'
---

## Overview

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

ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

The convert_chmap_v3() has a loop with its increment size of
cs_desc->wLength, but we forgot to validate cs_desc->wLength itself,
which may lead to potential endless loop by a malformed descriptor.

Add a proper size check to abort the loop for plugging the hole.

## Affected

- `linux_kernel >= 5.4.297, < 5.5`
- `linux_kernel >= 5.10.241, < 5.10.258`
- `linux_kernel >= 5.15.190, < 5.15.209`
- `linux_kernel >= 6.1.149, < 6.1.175`
- `linux_kernel >= 6.6.103, < 6.6.140`
- `linux_kernel >= 6.12.43, < 6.12.88`
- `linux_kernel >= 6.15.11, < 6.16`
- `linux_kernel >= 6.16.2, < 6.17`
- `linux_kernel >= 6.17.1, < 6.18.30`
- `linux_kernel >= 6.19, < 7.0.7`
- `linux_kernel = 6.17`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.7`