---
id: CVE-2026-93039
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: meson: Keep link pointers valid on realloc failure

  meson_card_reallocate_links() grows the DAI link and private data
  arrays with two consecutive krealloc() calls…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: meson: Keep link pointers valid on realloc failure

  meson_card_reallocate_links() grows the DAI link and private data
  arrays with two consecutive krealloc() calls…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    de33afc57f24538186bccf4c4f6c65dd38634fd8
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    8db0a0fc84e80aa9924e0833aef6cc95df94e5a7
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    0b30fbe6bf7cf6499b19dd886f466e7c9e820089
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe
  - >-
    Linux >= 7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <
    2aaa41cf974f83a6fb105422bac4e2f107150774
  - Linux 4.19
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:18.750'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93039'
references:
  - url: 'https://git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00168
epssPercentile: 0.05416
ingestedAt: '2026-09-17T16:21:47.776Z'
---

## Overview

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

ASoC: meson: Keep link pointers valid on realloc failure

meson_card_reallocate_links() grows the DAI link and private data
arrays with two consecutive krealloc() calls and updates the owner
pointers only after both calls have succeeded.

A successful krealloc() may move the data: it frees the old block and
returns a new one. When that happens for the link array and the second
krealloc() then fails, card->dai_link still points to the block that
krealloc() already freed, and the error path frees the new block too.
The probe error path then calls meson_card_clean_references(), which
dereferences card->dai_link and kfree()s it again, resulting in a
use-after-free and a double free.

Commit card->dai_link and card->num_links right after the first
krealloc() succeeds, so the pointer always refers to a valid allocation
that meson_card_clean_references() can walk and free. krealloc() with
__GFP_ZERO zero-initializes the added entries, so walking them on the
error path is safe. With both failure paths reduced to a plain return,
drop the goto labels and the error message.

## Remediation

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