---
id: CVE-2026-92492
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks

  cpufreq_cpu_get() returns NULL when no cpufreq policy is associated with
  the requested CPU, for exam…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks

  cpufreq_cpu_get() returns NULL when no cpufreq policy is associated with
  the requested CPU, for exam…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 471d6659925aa0dcb4ab2520fa5ee3f49dfeab22 <
    70c8c8b50d80f681f50ddcc66a9400dd87508913
  - >-
    Linux >= e30ca6dd5345c5b8ba05f346a8e81105352fe571 <
    f4ade8d224756ab69f108204dde6777bac4664e4
  - >-
    Linux >= e30ca6dd5345c5b8ba05f346a8e81105352fe571 <
    39c0cf62fc7851a17782e7efe8dfb2948739c681
  - Linux 7.1
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:51.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92492'
references:
  - url: 'https://git.kernel.org/stable/c/39c0cf62fc7851a17782e7efe8dfb2948739c681'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/70c8c8b50d80f681f50ddcc66a9400dd87508913'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f4ade8d224756ab69f108204dde6777bac4664e4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.784Z'
epss: 0.00206
epssPercentile: 0.09481
---

## Overview

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

cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks

cpufreq_cpu_get() returns NULL when no cpufreq policy is associated with
the requested CPU, for example because the CPU is offline or the policy
has already been torn down.  Both amd_pstate_power_supply_notifier() and
amd_pstate_profile_set() acquire a policy via cpufreq_cpu_get() and then
pass that pointer to amd_pstate_get_balanced_epp() and
amd_pstate_set_epp(), which dereference it unconditionally.  A racing
CPU hotplug or driver teardown can therefore lead to a NULL pointer
dereference on either of these dynamic EPP paths.

The third cpufreq_cpu_get() caller in this file, amd_pstate_verify(),
already handles the NULL case.  Bring the two new callers in line with
that pattern: return NOTIFY_OK from the power-supply notifier (matching
the other "nothing to do" exits) and -ENODEV from amd_pstate_profile_set()
(the usual cpufreq error for a missing CPU policy).

Found by code inspection; not tested on hardware.

## Remediation

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