Privilege Escalation in FluxInk Color Management Driver

Executive Summary

This vulnerability exists in the FluxInk Color Management Driver (TcnPeripheral64.sys) version 1.0.7.2. It allows a local standard user to escalate their privileges by exploiting arbitrary physical memory mapping at \Device\PhysicalMemory. Essentially, a user with limited permissions can gain higher-level access on the system through this flaw.

The issue was fixed in version 1.0.7.6 of the driver, which is available in the Windows 11 25H2 Hardware Lab Kit and may also be distributed via Windows Update or directly from Lenovo.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can allow a local user with standard privileges to escalate their access rights to a higher privilege level on the affected system. This means an attacker could potentially execute actions or access data that should be restricted, leading to unauthorized system control or data exposure.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, update the FluxInk Color Management Driver (TcnPeripheral64.sys) to version 1.0.7.6 or later.

The fixed driver is available in the Windows 11 25H2 Hardware Lab Kit (HLK) and may also be obtained through Windows Update or directly from Lenovo.

Useful 0 Not Useful 0

Compliance Impact

CVE-2026-58583 is a local privilege escalation vulnerability that allows a standard user to gain elevated privileges by exploiting arbitrary physical memory mapping. This can lead to unauthorized access to sensitive system resources and data, including credential theft and security bypasses.

Such unauthorized privilege escalation and potential data exposure can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require strict controls over access to personal and sensitive information.

Organizations affected by this vulnerability may face increased risk of data breaches and unauthorized data access, which could result in non-compliance with these regulations if not properly mitigated or remediated.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability involves the TcnPeripheral64.sys driver version 1.0.7.2 or earlier, which exposes an IOCTL (0x4002848) allowing arbitrary physical memory mapping. Detection involves identifying if this vulnerable driver is installed and loaded on the system.

You can check for the presence and version of the driver by using Windows PowerShell or Command Prompt commands to query installed drivers.

• Use PowerShell to list the driver and its version: Get-WmiObject Win32_PnPSignedDriver | Where-Object { $_.DriverName -like '*TcnPeripheral64.sys*' } | Select-Object DeviceName, DriverVersion
• Use Command Prompt to check if the driver service is running: sc query TcnPeripheral64
• Check loaded drivers with: driverquery | findstr TcnPeripheral64.sys

If the vulnerable driver version (1.0.7.2 or earlier) is found, the system is susceptible to this local privilege escalation vulnerability.

Additionally, monitoring for suspicious use of the IOCTL 0x4002848 or attempts to access \Device\PhysicalMemory could indicate exploitation attempts, but specific detection commands for this are not provided in the available resources.

Useful 0 Not Useful 0