ALCPU Core Temp up to 1.20 Kernel Driver ioctl access control

Summaryinfo

A vulnerability, which was classified as very critical, was found in ALCPU Core Temp up to 1.20. This affects the function ioctl of the component Kernel Driver. Executing a manipulation can lead to access control. The identification of this vulnerability is CVE-2026-109836. The attack can only be executed locally. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical was found in ALCPU Core Temp up to 1.20. This vulnerability affects the function ioctl of the component Kernel Driver. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at alcpu.com. This vulnerability was named CVE-2026-109836 since 10/13/2026. The exploitation appears to be easy. Local access is required to approach this attack. Additional levels of successful authentication are needed for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/04/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 1.21 eliminates this vulnerability.

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Productinfo

Vendor

• ALCPU

Name

• Core Temp

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20

CPE 2.3info

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CPE 2.2info

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