---
id: CVE-2026-97930
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf

  The in04_last array in struct usx2ydev is declared as char[24], but
  in04_buf is allocated as sizeof(str…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf

  The in04_last array in struct usx2ydev is declared as char[24], but
  in04_buf is allocated as sizeof(str…
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-125
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    e75e4b0e647137f4c9f6dee4a7ef5b7b09e16f57
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    869fb83c072e884b80d93eab498e6040ffb010ba
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    d170cfbe38c8817ac787f605655546a6d343017d
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    229cab526580f82839ae8e4e379753c8cf16952e
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    381495b5b3da12d714e53d9d12d955b13fe26eac
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b5753bdfd909f7f095fb464d67802b5e52cbadbf
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    861111a14740e12c36d363e9830f8daa734279c9
  - Linux 2.6.12
published: '2026-09-25'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:18:10.800'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97930'
references:
  - url: 'https://git.kernel.org/stable/c/229cab526580f82839ae8e4e379753c8cf16952e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/381495b5b3da12d714e53d9d12d955b13fe26eac'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/861111a14740e12c36d363e9830f8daa734279c9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/869fb83c072e884b80d93eab498e6040ffb010ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b5753bdfd909f7f095fb464d67802b5e52cbadbf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d170cfbe38c8817ac787f605655546a6d343017d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e75e4b0e647137f4c9f6dee4a7ef5b7b09e16f57'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97930.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97930'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541134'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97930'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97930'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97930.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00206
epssPercentile: 0.1051
cvssSource: vendor
ingestedAt: '2026-09-25T11:06:38.886Z'
---

## Overview

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

ALSA: usbusx2y: fix in04_last array size mismatch with in04_buf

The in04_last array in struct usx2ydev is declared as char[24], but
in04_buf is allocated as sizeof(struct us428_ctls) which is 21 bytes.
In i_usx2y_in04_int(), when ctl_snapshot_last == -2 (initialization
path):

    memcpy(usx2y->in04_last, usx2y->in04_buf, sizeof(usx2y->in04_last));

This copies 24 bytes from a 21-byte slab allocation, reading 3 bytes
past the end of the source object.

Introduce a USX2Y_IN04_SIZE constant defined as sizeof(struct
us428_ctls) and use it consistently for the in04_last array, the
in04_buf allocation, the URB transfer length, and the comparison loop,
replacing the bare 24 and 21 literals throughout.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97930.json)