---
id: CVE-2026-89946
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: cs35l33: drain threaded IRQ before runtime suspend

  cs35l33_runtime_suspend() currently switches the codec into
  regcache_cache_only(true) and powers it down witho…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ASoC: cs35l33: drain threaded IRQ before runtime suspend

  cs35l33_runtime_suspend() currently switches the codec into
  regcache_cache_only(true) and powers it down witho…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    d07799302721d381aef834fac8a11d196894eccb
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    5b5311427e54d9c0d07178ee42df68ba44c2d5ca
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    a04722542c76ce861031384480825afded8cc4f4
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    614c2616ea677abfbed917a92bdc5141efff3536
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    6ae98918240585eb2ad32b097c4810f4e2dabe88
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    84cf6acd01a1ec8f30276578a039216327af782e
  - >-
    Linux >= 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8 <
    e074c12c428c633e079154301207a6079a208583
  - Linux 4.8
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:04.547'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89946'
references:
  - url: 'https://git.kernel.org/stable/c/5b5311427e54d9c0d07178ee42df68ba44c2d5ca'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/614c2616ea677abfbed917a92bdc5141efff3536'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6ae98918240585eb2ad32b097c4810f4e2dabe88'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/84cf6acd01a1ec8f30276578a039216327af782e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a04722542c76ce861031384480825afded8cc4f4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d07799302721d381aef834fac8a11d196894eccb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e074c12c428c633e079154301207a6079a208583'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.964Z'
epss: 0.0021
epssPercentile: 0.11547
---

## Overview

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

ASoC: cs35l33: drain threaded IRQ before runtime suspend

cs35l33_runtime_suspend() currently switches the codec into
regcache_cache_only(true) and powers it down without first quiescing the
threaded IRQ registered by devm_request_threaded_irq(). That leaves a
window where cs35l33_irq_thread() can still run after suspend has closed
off live register access.

A running system can reach this during runtime PM while the driver still
has critical fault IRQs unmasked. If the threaded handler runs in that
window, it reads volatile INT_STATUS_1/2 after cache_only has been
enabled, ignores the regmap_read() failures, and can still drive the
AMP_SHORT_RLS, CAL_ERR_RLS, OTE_RLS, and OTW_RLS release paths.

Use disable_irq() before entering cache_only/power-off so any in-flight
threaded handler is drained and no new IRQ thread can run during the
suspended state. Re-enable the IRQ only after runtime_resume() has
restored live register access with regcache_sync(). Since probe only
warns if devm_request_threaded_irq() fails, track whether the IRQ was
actually installed before disabling or re-enabling it.

## Remediation

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