---
id: CVE-2026-90208
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type

  Samsung PWM timer might be used as a clock source on some legacy systems.
  When PREEMPT_RT is enabled on …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type

  Samsung PWM timer might be used as a clock source on some legacy systems.
  When PREEMPT_RT is enabled on …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= f11899894c0a683c754ca71b45f7c9c3d35a3a1c <
    7eb5764d25c4ac7f5d126621660f7219b61fd2fd
  - >-
    Linux >= f11899894c0a683c754ca71b45f7c9c3d35a3a1c <
    3b212f9d70805d91febae01d618868f4860e267c
  - Linux 3.10
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:15.950'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90208'
references:
  - url: 'https://git.kernel.org/stable/c/3b212f9d70805d91febae01d618868f4860e267c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7eb5764d25c4ac7f5d126621660f7219b61fd2fd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.858Z'
epss: 0.00198
epssPercentile: 0.08478
---

## Overview

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

clocksource/drivers/samsung_pwm: Switch to raw_spinlock_t type

Samsung PWM timer might be used as a clock source on some legacy systems.
When PREEMPT_RT is enabled on ARM, regular spinlock is converted to a
sleeping lock (mutex-based), which must not be used in atomic context
such as hard interrupt handlers. Switch the samsung_pwm_lock to the
raw_spinlock, which remains a true non-sleeping spinlock even
under PREEMPT_RT.

## Remediation

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