---
id: CVE-2026-72301
title: 'ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get

  In sof_ipc3_bytes_put(), the size used for the memcpy is derived from
  the old data->size already in the …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 544ac8858f249950b4d99c68e538cdc07300528f <
    8bd715a9d882fe1993bb2aec5eff89fffa946592
  - >-
    Linux >= 544ac8858f249950b4d99c68e538cdc07300528f <
    0dce240145f47545d2e4b18c6d58033b83e1fd0e
  - >-
    Linux >= 544ac8858f249950b4d99c68e538cdc07300528f <
    ed4f758f34be4c32e02933ac4fa044589d9c1c16
  - >-
    Linux >= 544ac8858f249950b4d99c68e538cdc07300528f <
    0c4fbdaca225b97122b61b68c5353caa33a253c3
  - >-
    Linux >= 544ac8858f249950b4d99c68e538cdc07300528f <
    92f90917413bdd6078fefff6f6c83a07bf870b04
  - >-
    Linux >= 544ac8858f249950b4d99c68e538cdc07300528f <
    1f97760417b5faa60e9642fd0ed61eb17d0b1b39
  - Linux 5.18
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:46:11.606714Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:55:16.018Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72301'
references:
  - url: 'https://git.kernel.org/stable/c/8bd715a9d882fe1993bb2aec5eff89fffa946592'
  - url: 'https://git.kernel.org/stable/c/0dce240145f47545d2e4b18c6d58033b83e1fd0e'
  - url: 'https://git.kernel.org/stable/c/ed4f758f34be4c32e02933ac4fa044589d9c1c16'
  - url: 'https://git.kernel.org/stable/c/0c4fbdaca225b97122b61b68c5353caa33a253c3'
  - url: 'https://git.kernel.org/stable/c/92f90917413bdd6078fefff6f6c83a07bf870b04'
  - url: 'https://git.kernel.org/stable/c/1f97760417b5faa60e9642fd0ed61eb17d0b1b39'
tags:
  - cve.org
epss: 0.00164
epssPercentile: 0.05265
ingestedAt: '2026-10-16T19:46:24.410Z'
---

## Overview

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

ASoC: SOF: ipc3-control: Fix TOCTOU in bytes_put and bytes_get

In sof_ipc3_bytes_put(), the size used for the memcpy is derived from
the old data->size already in the buffer, not the incoming new data's
size field. If the new data has a different size, the copy length is
wrong: it may truncate valid data or copy stale bytes.

Similarly, sof_ipc3_bytes_get() checks data->size against max_size
without accounting for the sizeof(struct sof_ipc_ctrl_data) offset
of the flex array within the allocation.

Fix bytes_put to validate and use the incoming data's sof_abi_hdr.size
from ucontrol before copying. Fix bytes_get to subtract sizeof(*cdata)
from the bounds check to match the actual available space.

## Affected

- `Linux >= 544ac8858f249950b4d99c68e538cdc07300528f < 8bd715a9d882fe1993bb2aec5eff89fffa946592`
- `Linux >= 544ac8858f249950b4d99c68e538cdc07300528f < 0dce240145f47545d2e4b18c6d58033b83e1fd0e`
- `Linux >= 544ac8858f249950b4d99c68e538cdc07300528f < ed4f758f34be4c32e02933ac4fa044589d9c1c16`
- `Linux >= 544ac8858f249950b4d99c68e538cdc07300528f < 0c4fbdaca225b97122b61b68c5353caa33a253c3`
- `Linux >= 544ac8858f249950b4d99c68e538cdc07300528f < 92f90917413bdd6078fefff6f6c83a07bf870b04`
- `Linux >= 544ac8858f249950b4d99c68e538cdc07300528f < 1f97760417b5faa60e9642fd0ed61eb17d0b1b39`
- `Linux 5.18`

## Remediation

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