---
id: CVE-2026-92382
title: An out-of-bounds write flaw was found in usbredir
summary: >-
  An out-of-bounds write flaw was found in usbredir. Starting an isochronous OUT
  stream with a transfer count of 1 leaves the stream's single transfer buffer
  permanently unsubmitted, defeating the bounds check in
  usbredirhost_iso_packet() …
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-787
vendor: Red Hat
product: usbredir
affected:
  - usbredir (all versions)
  - usbredir
  - usbredir (all versions)
  - usbredir (all versions)
  - usbredir (all versions)
published: '2026-09-21'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T19:37:36.747'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92382'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-92382'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2535972'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92382.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-92382'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92382'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00136
epssPercentile: 0.02434
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T19:40:37.757177Z'
ingestedAt: '2026-09-21T17:49:53.180Z'
---

## Overview

An out-of-bounds write flaw was found in usbredir. Starting an isochronous OUT stream with a transfer count of 1 leaves the stream's single transfer buffer permanently unsubmitted, defeating the bounds check in usbredirhost_iso_packet() and allowing a usbredir peer to write past the end of the packet descriptor array on every subsequent isochronous packet.

## 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 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92382.json)