---
id: CVE-2026-89895
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: cobalt: Avoid freeing ALSA private data twice

  snd_cobalt_card_create() stores cobsc in sc->private_data and installs
  snd_cobalt_card_private_free() as sc->priva…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: cobalt: Avoid freeing ALSA private data twice

  snd_cobalt_card_create() stores cobsc in sc->private_data and installs
  snd_cobalt_card_private_free() as sc->priva…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    75bbf45e3a954e292ae26832d2df40ca2e3ee452
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    fe65028ee72a7e07e572b351891bd7a1f8917d33
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    61dfa8ded5efc3a25d331fa9ce5cebb85531fe70
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    6cbc8a73b3464ebeccc49987b7233b6b087b8504
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    cb1218da234ea15fa14d90e2d049d686874d7aa3
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    8c6610e230b9355cf7df5a338a0592c0f088c00b
  - >-
    Linux >= 85756a069c55e0315ac5990806899cfb607b987f <
    3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1
  - Linux 4.2
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:16:58.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89895'
references:
  - url: 'https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.980Z'
epss: 0.0022
epssPercentile: 0.11029
---

## Overview

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

media: cobalt: Avoid freeing ALSA private data twice

snd_cobalt_card_create() stores cobsc in sc->private_data and installs
snd_cobalt_card_private_free() as sc->private_free. From that point,
snd_card_free(sc) releases cobsc through the ALSA card cleanup path.

If cobalt_alsa_init() fails after snd_cobalt_card_create(), the
err_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That
second free releases the same object again.

Remove the explicit kfree(cobsc) and leave ownership with the ALSA card.

This issue was found by a static analysis checker and confirmed by
manual source review.

## Remediation

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