CVE-2025-61155 affects the GameDriverX64.sys kernel-mode anti-cheat driver up to version 7.23.4.7. The vulnerability arises because the driver improperly validates IOCTL requests from local user-mode processes with low privileges. This allows such processes to execute commands in kernel mode that can terminate arbitrary processes, including critical system and security services. The flaw can cause system instability or denial of service. Exploitation requires local access but no user interaction. The CVSS 3.1 score is 5.5 (medium severity), reflecting local attack vector, low complexity, low privileges required, no user interaction, and impact limited to availability (denial of service).

An attacker with local low-privilege access can exploit this vulnerability to terminate arbitrary processes, including critical system and security services. This can result in system instability or denial of service conditions. There is no confidentiality or integrity impact reported. No known exploits in the wild have been documented.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. Until a fix is available, restrict local access to trusted users and consider disabling or limiting use of the affected driver version if possible.