---
id: CVE-2022-50239
title: 'cpufreq: qcom: fix writes in read-only memory region'
summary: "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: qcom: fix writes in read-only memory region\n\nThis commit fixes a kernel oops because of a write in some read-only memory:\n\n\t[    9.068287] Unable to handle ker…"
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b <
    794ded0bc461287a268bed21fea2eebb6e5d232c
  - >-
    Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b <
    14d260f94ff89543597ffea13db8b277a810e08e
  - >-
    Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b <
    b74ee4e301ca01e431e240c046173332966e2431
  - >-
    Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b <
    01039fb8e90c9cb684430414bff70cea9eb168c5
  - Linux 5.7
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:07:35.394692Z'
published: '2025-09-15'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:10:30.383Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2022-50239'
references:
  - url: 'https://git.kernel.org/stable/c/794ded0bc461287a268bed21fea2eebb6e5d232c'
  - url: 'https://git.kernel.org/stable/c/14d260f94ff89543597ffea13db8b277a810e08e'
  - url: 'https://git.kernel.org/stable/c/b74ee4e301ca01e431e240c046173332966e2431'
  - url: 'https://git.kernel.org/stable/c/01039fb8e90c9cb684430414bff70cea9eb168c5'
tags:
  - cve.org
epss: 0.00163
epssPercentile: 0.05511
ingestedAt: '2026-11-05T22:38:31.709Z'
---

## Overview

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

cpufreq: qcom: fix writes in read-only memory region

This commit fixes a kernel oops because of a write in some read-only memory:

	[    9.068287] Unable to handle kernel write to read-only memory at virtual address ffff800009240ad8
	..snip..
	[    9.138790] Internal error: Oops: 9600004f [#1] PREEMPT SMP
	..snip..
	[    9.269161] Call trace:
	[    9.276271]  __memcpy+0x5c/0x230
	[    9.278531]  snprintf+0x58/0x80
	[    9.282002]  qcom_cpufreq_msm8939_name_version+0xb4/0x190
	[    9.284869]  qcom_cpufreq_probe+0xc8/0x39c
	..snip..

The following line defines a pointer that point to a char buffer stored
in read-only memory:

	char *pvs_name = "speedXX-pvsXX-vXX";

This pointer is meant to hold a template "speedXX-pvsXX-vXX" where the
XX values get overridden by the qcom_cpufreq_krait_name_version function. Since
the template is actually stored in read-only memory, when the function
executes the following call we get an oops:

	snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",
		 speed, pvs, pvs_ver);

To fix this issue, we instead store the template name onto the stack by
using the following syntax:

	char pvs_name_buffer[] = "speedXX-pvsXX-vXX";

Because the `pvs_name` needs to be able to be assigned to NULL, the
template buffer is stored in the pvs_name_buffer and not under the
pvs_name variable.

## Affected

- `Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < 794ded0bc461287a268bed21fea2eebb6e5d232c`
- `Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < 14d260f94ff89543597ffea13db8b277a810e08e`
- `Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < b74ee4e301ca01e431e240c046173332966e2431`
- `Linux >= a8811ec764f95a04ba82f6f457e28c5e9e36e36b < 01039fb8e90c9cb684430414bff70cea9eb168c5`
- `Linux 5.7`

## Remediation

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