---
id: CVE-2018-10902
title: >-
  It was found that the raw midi kernel driver does not protect against
  concurrent access which leads to a double realloc (double free) in
  snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of
  snd_rawmidi_ioctl() han…
summary: >-
  It was found that the raw midi kernel driver does not protect against
  concurrent access which leads to a double realloc (double free) in
  snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of
  snd_rawmidi_ioctl() han…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
  - CWE-415
vendor: debian
product: debian_linux
affected:
  - debian_linux = 8.0
  - debian_linux = 9.0
  - ubuntu_linux = 12.04
  - ubuntu_linux = 14.04
  - ubuntu_linux = 16.04
  - ubuntu_linux = 18.04
  - linux_kernel
  - enterprise_linux_desktop = 6.0
  - enterprise_linux_desktop = 7.0
  - enterprise_linux_server = 6.0
  - enterprise_linux_server = 7.0
  - enterprise_linux_workstation = 6.0
  - enterprise_linux_workstation = 7.0
published: '2018-08-21'
updated: '2026-07-07'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2018-10902'
references:
  - url: 'http://www.securityfocus.com/bid/105119'
    label: secalert@redhat.com
  - url: 'http://www.securitytracker.com/id/1041529'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2018:3083'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2018:3096'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2019:0415'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2019:0641'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2019:3217'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2019:3967'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10902'
    label: secalert@redhat.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=39675f7a7c7e7702f7d5341f1e0d01db746543a0
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3776-1/'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3776-2/'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3847-1/'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3847-2/'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3847-3/'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3849-1/'
    label: secalert@redhat.com
  - url: 'https://usn.ubuntu.com/3849-2/'
    label: secalert@redhat.com
  - url: 'https://www.debian.org/security/2018/dsa-4308'
    label: secalert@redhat.com
  - url: 'http://www.securityfocus.com/bid/105119'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.securitytracker.com/id/1041529'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2018:3083'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2018:3096'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2019:0415'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2019:0641'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2019:3217'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2019:3967'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10902'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=39675f7a7c7e7702f7d5341f1e0d01db746543a0
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3776-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3776-2/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3847-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3847-2/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3847-3/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3849-1/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://usn.ubuntu.com/3849-2/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2018/dsa-4308'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00523
epssPercentile: 0.43177
ingestedAt: '2026-07-07T15:38:35.702Z'
---

## Overview

It was found that the raw midi kernel driver does not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation.

## Affected

- `debian_linux = 8.0`
- `debian_linux = 9.0`
- `ubuntu_linux = 12.04`
- `ubuntu_linux = 14.04`
- `ubuntu_linux = 16.04`
- `ubuntu_linux = 18.04`
- `linux_kernel`
- `enterprise_linux_desktop = 6.0`
- `enterprise_linux_desktop = 7.0`
- `enterprise_linux_server = 6.0`
- `enterprise_linux_server = 7.0`
- `enterprise_linux_workstation = 6.0`
- `enterprise_linux_workstation = 7.0`

## Remediation

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