NULL Pointer Dereference in Little Orbit GFAC Driver

Executive Summary

This vulnerability is a NULL pointer dereference in the driver GFAC_Sys_x64.sys used by Little Orbit GFAC. It allows a local attacker to send specially crafted requests that cause the system to crash.

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Compliance Impact

The provided information does not specify any direct impact of the CVE-2026-12166 vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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Impact Analysis

The vulnerability can lead to a denial of service condition by crashing the system when exploited by a local attacker.

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Detection Guidance

The vulnerability involves the GFAC_Sys_x64.sys driver in the Little Orbit GFAC software causing a NULL pointer dereference and system crash when triggered by crafted local requests.

Detection would focus on identifying the presence of the GFAC_Sys_x64.sys driver on the system and monitoring for system crashes or denial of service symptoms related to this driver.

Suggested commands to detect the presence of the vulnerable driver include:

• On Windows, use `sc query GFAC_Sys_x64` or `driverquery | findstr GFAC_Sys_x64.sys` to check if the driver is loaded.
• Use event viewer or system logs to look for crash reports or system errors related to GFAC_Sys_x64.sys.
• Monitor for unusual system crashes or denial of service events that could be triggered by crafted local requests targeting this driver.

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Mitigation Strategies

Since no patch or fix has been provided by the vendor, immediate mitigation steps focus on limiting exposure and preventing exploitation.

• Restrict local access to the system to trusted users only, as the vulnerability requires local attacker interaction.
• Disable or uninstall the Little Orbit GFAC software or any games that depend on the GFAC driver to prevent the vulnerable driver from being loaded.
• Monitor system stability and logs for signs of crashes or exploitation attempts related to the GFAC_Sys_x64.sys driver.

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