---
id: CVE-2026-52963
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usb-audio: Bound MIDI endpoint descriptor scans

  snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint
  descriptor size before using baAssocJackI…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usb-audio: Bound MIDI endpoint descriptor scans

  snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint
  descriptor size before using baAssocJackI…
severity: none
published: '2026-06-24'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52963'
references:
  - url: 'https://git.kernel.org/stable/c/09141583bd97f4bbd7358e29fd138fe798467cdb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3d3b2b01a3e73828e201ece96f863e7a3e0cdc6e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/728ab0c72e49ca27185067984cd565425eb69b2e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a0226560540c16717efcceaf15c862cf115b01d3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c59159ce10e75b568cd0d4b29efcb0fb0ddecc94'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c65b137d351e21cbc5630e73ef0eb1e1d75f5b20'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d6854daa67be623860f4e1873fd3d3c275aba4ed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e2f1260a056eb3215c13c48c5378f3e4112dc3af'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00162
epssPercentile: 0.04787
ingestedAt: '2026-07-11T13:13:24.963Z'
---

## Overview

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

ALSA: usb-audio: Bound MIDI endpoint descriptor scans

snd_usbmidi_get_ms_info() validates the internal MIDIStreaming endpoint
descriptor size before using baAssocJackID[], but the descriptor walker can
still return a class-specific endpoint descriptor whose bLength exceeds the
remaining bytes in the endpoint-extra scan.

That leaves later flexible-array reads bounded by bLength, but not by the
remaining bytes in the endpoint-extra scan.

Stop walking when bLength is zero or
extends past the remaining endpoint-extra scan.

## Remediation

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