---
id: CVE-2026-98086
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: ump: do not touch legacy_rmidi before it exists

  snd_ump_parse_endpoint() sets ump->parsed on every exit, including
  error, before the caller attaches the legacy r…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ALSA: ump: do not touch legacy_rmidi before it exists

  snd_ump_parse_endpoint() sets ump->parsed on every exit, including
  error, before the caller attaches the legacy r…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 37e0e14128e0685267dc5c037bf655421a6ce2ea <
    1c8e01792adf91879322f1ad752f1814de8b7e7d
  - >-
    Linux >= 37e0e14128e0685267dc5c037bf655421a6ce2ea <
    228075f31b141395233218712242913125ace4e0
  - >-
    Linux >= 37e0e14128e0685267dc5c037bf655421a6ce2ea <
    a4cef20cd473e0640fefd38094d4baac0ec76ae3
  - >-
    Linux >= 37e0e14128e0685267dc5c037bf655421a6ce2ea <
    adeee7187694719890aaffdc14b7e89cfd736f1d
  - Linux 6.5
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:38.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98086'
references:
  - url: 'https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.834Z'
---

## Overview

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

ALSA: ump: do not touch legacy_rmidi before it exists

snd_ump_parse_endpoint() sets ump->parsed on every exit, including
error, before the caller attaches the legacy rawmidi device.
ump_handle_ep_name_msg() then treats parsed as "legacy_rmidi is live"
and calls ump_legacy_set_rawmidi_name(), which snprintf()s into
ump->legacy_rmidi->name. If a UMP packet arrives in that window
(IRQ path from snd_ump_receive), legacy_rmidi is still NULL
(KASAN null-ptr-deref in snprintf).

Guard the legacy helpers. parsed only means endpoint info was
parsed, not that legacy_rmidi exists.

## Remediation

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