---
id: CVE-2026-109836
title: >-
  The Core Temp kernel driver provided by ALCPU is vulnerable to insufficient
  access control in an exposed IOCTL, which may allow physical memory to be read
  or written.
summary: >-
  The Core Temp kernel driver provided by ALCPU is vulnerable to insufficient
  access control in an exposed IOCTL, which may allow physical memory to be read
  or written.
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-782
vendor: ALCPU
product: Core Temp
affected:
  - core_temp < 1.21
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-06T19:08:24.682563Z'
published: '2026-11-03'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T19:08:38.663Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-109836'
references:
  - url: 'http://www.alcpu.com/CoreTemp'
  - url: 'https://jvn.jp/en/jp/JVN23328936/'
tags:
  - cve.org
epss: 0.00122
epssPercentile: 0.01998
ingestedAt: '2026-11-05T20:33:06.611Z'
---

## Overview

The Core Temp kernel driver provided by ALCPU is vulnerable to insufficient access control in an exposed IOCTL, which may allow physical memory to be read or written.

## Affected

- `core_temp < 1.21`

## Remediation

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