---
id: CVE-2023-4132
title: 'Kernel: smsusb: use-after-free caused by do_submit_urb()'
summary: >-
  A use-after-free vulnerability was found in the siano smsusb module in the
  Linux kernel. The bug occurs during device initialization when the siano
  device is plugged in. This flaw allows a local user to crash the system,
  causing a denial…
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'
cvssSource: cna
cwe:
  - CWE-416
vendor: Red Hat
product: kernel-rt
affected:
  - kernel-rt (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel
  - kernel
  - kernel-rt
  - kernel
  - kernel-rt
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-04-25T15:30:20.281573Z'
published: '2023-08-03'
updated: '2026-11-07'
sourceUpdated: '2026-11-07T11:32:29.156Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-4132'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2023:6901'
    label: 'RHSA-2023:6901'
  - url: 'https://access.redhat.com/errata/RHSA-2023:7077'
    label: 'RHSA-2023:7077'
  - url: 'https://access.redhat.com/errata/RHSA-2024:0575'
    label: 'RHSA-2024:0575'
  - url: 'https://access.redhat.com/errata/RHSA-2024:0724'
    label: 'RHSA-2024:0724'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-4132'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2221707'
    label: RHBZ#2221707
tags:
  - cve.org
epss: 0.00253
epssPercentile: 0.16951
ingestedAt: '2026-11-07T12:16:41.113Z'
---

## Overview

A use-after-free vulnerability was found in the siano smsusb module in the Linux kernel. The bug occurs during device initialization when the siano device is plugged in. This flaw allows a local user to crash the system, causing a denial of service condition.

## Affected

- `kernel-rt (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel`
- `kernel`
- `kernel-rt`
- `kernel`
- `kernel-rt`

## Remediation

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