---
id: CVE-2026-98741
title: >-
  kernel: ALSA: ua101: reject mismatched capture/playback packet sizes
  (CVE-2026-98741)
summary: >-
  A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound
  Architecture) UA-101 USB audio driver. The driver does not validate that
  packet sizes and channel numbers match between capture and playback endpoints
  during device initiali…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-787
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T02:11:43+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98741.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98741.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98741'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2555081'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98741'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98741'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98741.mbox
  - url: 'https://git.kernel.org/stable/c/ada5ded765f059a6e3036e69ca350449442af0fc'
  - url: 'https://git.kernel.org/stable/c/fd3a7bf0d988b0878a1957df150edb35f81db87e'
  - url: 'https://git.kernel.org/stable/c/eb0c7fda59cf650076f8ed5b949a6c8441aa3606'
  - url: 'https://git.kernel.org/stable/c/4294fe57048594a9e158b61c967bb7f943cda477'
  - url: 'https://git.kernel.org/stable/c/86f86e6fdedc33c5b8d38b9208b350f8accf57ee'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00168
epssPercentile: 0.05983
ingestedAt: '2026-10-18T16:47:32.502Z'
---

## Overview

A flaw was found in the Linux kernel's ALSA (Advanced Linux Sound Architecture) UA-101 USB audio driver. The driver does not validate that packet sizes and channel numbers match between capture and playback endpoints during device initialization. An attacker who connects a specially crafted USB device can trigger an out-of-bounds memory write past the playback buffer. This vulnerability can lead to a denial of service (DoS) through a kernel crash or potentially allow arbitrary code execution with kernel privileges.

## Vendor advisories

- **Red Hat VEX** · Important · 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 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98741.json)

**kernel: ALSA: ua101: reject mismatched capture/playback packet sizes** — rated Important by Red Hat. Released 2026-10-18, updated 2026-10-23.

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 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

## Remediation

Affected