---
id: CVE-2026-64481
title: 'kernel: ALSA: hda/cs35l41: Fix firmware load work teardown (CVE-2026-64481)'
summary: >-
  A flaw was found in the Linux kernel's ALSA sound driver for the cs35l41
  component. This vulnerability occurs because the driver fails to properly
  remove controls and cancel firmware load work during component unbinding or
  device removal, …
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-825
vendor: Red Hat
product: Red Hat Enterprise Linux BaseOS (v. 10)
affected:
  - enterprise_linux 9
  - 10base_smtv
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - enterprise_linux_baseos_v_10
  - enterprise_linux_baseos_v_9
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_codeready_linux_builder_v_9
  - enterprise_linux_hidden_v_10
  - enterprise_linux_real_time_for_nfv_v_10
  - enterprise_linux_real_time_for_nfv_v_9
  - enterprise_linux_real_time_v_10
  - enterprise_linux_real_time_v_9
patched:
  - 10base_smtv
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - enterprise_linux_baseos_v_10
  - enterprise_linux_baseos_v_9
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_codeready_linux_builder_v_9
  - enterprise_linux_hidden_v_10
  - enterprise_linux_real_time_for_nfv_v_10
  - enterprise_linux_real_time_for_nfv_v_9
  - enterprise_linux_real_time_v_10
  - enterprise_linux_real_time_v_9
published: '2026-07-25'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T04:32:02+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64481.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64481.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-64481'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2507038'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-64481'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64481'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026072548-CVE-2026-64481-d8df@gregkh/T
  - url: 'https://access.redhat.com/errata/RHSA-2026:88477'
  - url: 'https://access.redhat.com/errata/RHSA-2026:87805'
  - url: 'https://git.kernel.org/stable/c/3e339c88b8c3044919fd1936a8b23124285d0de6'
  - url: 'https://git.kernel.org/stable/c/8947215c0136c9d905e4a46d824824f8b48a2e5b'
  - url: 'https://git.kernel.org/stable/c/ce0a903d0591e3e2c790c5b628802b08d1b287cc'
  - url: 'https://git.kernel.org/stable/c/d6a40a4d083ef74d00c8f9516cb5ff07ac70720b'
  - url: 'https://git.kernel.org/stable/c/b65020d5398f499c09498c9786dba6d67ae57664'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00175
epssPercentile: 0.0698
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:41:19.470343Z'
scores:
  vendor: 7
  cna: 7.8
ingestedAt: '2026-10-16T17:24:46.823Z'
---

## Overview

A flaw was found in the Linux kernel's ALSA sound driver for the cs35l41 component. This vulnerability occurs because the driver fails to properly remove controls and cancel firmware load work during component unbinding or device removal, especially when firmware autostart is disabled. This can lead to a worker attempting to access driver data that is no longer valid after teardown, resulting in memory corruption. An attacker with local access could potentially exploit this to cause a denial of service or escalate privileges.

## Vendor advisories

- **RHSA-2026:88477** · Red Hat · fixed in: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Hidden (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), … · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88477)
- **RHSA-2026:87805** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-10-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:87805)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 9 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64481.json)

**kernel: ALSA: hda/cs35l41: Fix firmware load work teardown** — rated Moderate by Red Hat. Released 2026-07-25, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 9

Fixed:

- 10Base-SMTV
- Red Hat Enterprise Linux AppStream (v. 10)
- Red Hat Enterprise Linux AppStream (v. 9)
- Red Hat Enterprise Linux BaseOS (v. 10)
- Red Hat Enterprise Linux BaseOS (v. 9)
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
- Red Hat Enterprise Linux Hidden (v. 10)
- Red Hat Enterprise Linux Real Time for NFV (v. 10)
- Red Hat Enterprise Linux Real Time for NFV (v. 9)
- Red Hat Enterprise Linux Real Time (v. 10)
- Red Hat Enterprise Linux Real Time (v. 9)

No fix planned:

- Red Hat Enterprise Linux 9

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8

## Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:88477
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:87805