VDB-375943 · CVE-2026-12168 · EUVD-2026-41378

Little Orbit GameFirst Anti-Cheat up to 2025-07-07 Kernel Mode GFAC_Sys_x64.sys write-what-where condition

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.8	$0-$5k	0.69

Summaryinfo

A vulnerability, which was classified as critical, has been found in Little Orbit GameFirst Anti-Cheat up to 2025-07-07. The impacted element is an unknown function in the library GFAC_Sys_x64.sys of the component Kernel Mode. This manipulation causes write-what-where condition. This vulnerability appears as CVE-2026-12168. The attack requires local access. There is no available exploit.

Detailsinfo

A vulnerability has been found in Little Orbit GameFirst Anti-Cheat up to 2025-07-07 and classified as critical. Affected by this vulnerability is an unknown functionality in the library GFAC_Sys_x64.sys of the component Kernel Mode. The manipulation with an unknown input leads to a write-what-where condition vulnerability. The CWE definition for the vulnerability is CWE-123. Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An improper validation vulnerability for driver `GFAC_Sys_x64.sys` in Little Orbit GFAC allows a local attacker to escalate privileges to SYSTEM and execute arbitrary code in kernel mode via crafted messages sent through a Minifilter communication port.

This vulnerability is known as CVE-2026-12168 since 06/12/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/02/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-41378). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Little Orbit

Name

GameFirst Anti-Cheat

Version

2025-07-07

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.8
VulDB Temp Score: 7.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Write-what-where condition
CWE: CWE-123 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/12/2026 CVE reserved
07/02/2026 +20 days Advisory disclosed
07/02/2026 +0 days VulDB entry created
07/02/2026 +0 days VulDB entry last update

Sourcesinfo

Status: Not defined

CVE: CVE-2026-12168 (🔒)
GCVE (CVE): GCVE-0-2026-12168
GCVE (VulDB): GCVE-100-375943
EUVD: 🔒

Entryinfo

Created: 07/02/2026 17:37
Updated: 07/02/2026 21:47
Changes: 07/02/2026 17:37 (52), 07/02/2026 21:47 (1)
Complete: 🔍
Cache ID: 216::103