SYSTEM privilege escalation via arbitrary kernel write
Published Jul 2, 2026 · Updated Jul 2, 2026
Improper input validation in Little Orbit GamersFirst Anti-Cheat through 2025-07-07 allows local users to escalate to SYSTEM. The GFAC_Sys_x64.sys driver uses an attacker-controlled destination address and data value from a Minifilter port message for a kernel-memory write. Any non-administrative local user able to connect to the exposed port can overwrite sensitive structures such as a process token and execute code with kernel authority.
Summary
What happened
Improper input validation in Little Orbit GamersFirst Anti-Cheat through 2025-07-07 allows local users to escalate to SYSTEM. The GFAC_Sys_x64.sys driver uses an attacker-controlled destination address and data value from a Minifilter port message for a kernel-memory write. Any non-administrative local user able to connect to the exposed port can overwrite sensitive structures such as a process token and execute code with kernel authority.
The record
- CVE
- CVE-2026-12168
- Published
- Jul 2, 2026
- Updated
- Jul 2, 2026
- Vendor
- Little Orbit
- Product
- GamersFirst Anti-Cheat
- Classifications
- CWE-123, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 2, 2026CVE publishedPublication date reported by the CVE source.
- Jul 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <=2025-07-07
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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