---
id: CVE-2026-74291
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: topology: Check PCM and DAI name strings before use

  Topology objects store several PCM and DAI names in fixed-size UAPI
  arrays
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: topology: Check PCM and DAI name strings before use

  Topology objects store several PCM and DAI names in fixed-size UAPI
  arrays. Other topology parser paths valid…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 64527e8a352968bda529f01df1c9dd5fe581ff04 <
    473f7d25d93e80db526a9d05887f0071abdc6d9b
  - >-
    Linux >= 64527e8a352968bda529f01df1c9dd5fe581ff04 <
    5c2537cf24d673956b4e58029001667f89586fa2
  - >-
    Linux >= 64527e8a352968bda529f01df1c9dd5fe581ff04 <
    ba37b62ed0a443b8e23f53a7477e7f2537fd34c7
  - >-
    Linux >= 64527e8a352968bda529f01df1c9dd5fe581ff04 <
    b7e44d1986d6671342c19b82192189ca5db5dab7
  - Linux 4.6
published: '2026-08-15'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T14:17:18.643'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74291'
references:
  - url: 'https://git.kernel.org/stable/c/473f7d25d93e80db526a9d05887f0071abdc6d9b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5c2537cf24d673956b4e58029001667f89586fa2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b7e44d1986d6671342c19b82192189ca5db5dab7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ba37b62ed0a443b8e23f53a7477e7f2537fd34c7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00209
epssPercentile: 0.09806
ingestedAt: '2026-09-21T13:37:22.839Z'
---

## Overview

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

ASoC: topology: Check PCM and DAI name strings before use

Topology objects store several PCM and DAI names in fixed-size UAPI
arrays. Other topology parser paths validate these fields with bounded
strnlen() checks before using them as C strings, but the PCM and DAI
paths still pass some fixed-size arrays directly to strlen(),
devm_kstrdup(), DAI lookup, and diagnostic prints.

A malformed topology blob with a non-NUL-terminated PCM, DAI, or stream
capability name can therefore make the parser read past the end of the
fixed-size field.

Reject unterminated PCM and DAI name fields before consuming them as C
strings.

## Remediation

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