CVE-2025-67246 is a local privilege escalation and information disclosure vulnerability found in the Ludashi driver versions before 5.1025. The root cause is a lack of proper access control in the driver's IOCTL handler, which exposes a device interface accessible to normal (unprivileged) users. The IOCTL handler processes attacker-controlled input structures that specify physical memory addresses within the lower 4GB range. The handler uses MmMapIoSpace to map arbitrary physical memory into the driver's address space and then copies this data back to user mode without verifying the caller's privileges or validating the target physical address range. This flaw allows an unprivileged local user to read arbitrary physical memory, potentially exposing sensitive kernel data such as kernel pointers, security tokens, and internal kernel data structures. By reading kernel memory, attackers can bypass Kernel Address Space Layout Randomization (KASLR), a key security mitigation that randomizes kernel memory layout to prevent exploitation. Bypassing KASLR can facilitate further local privilege escalation attacks, allowing attackers to gain higher privileges on the system. Although no public exploits are currently known, the vulnerability's nature makes it a significant risk in environments where local user access is possible. The vulnerability affects all systems running the vulnerable Ludashi driver versions, regardless of other mitigations, and requires local access but no user interaction beyond issuing the IOCTL request. The lack of a CVSS score indicates this is a newly published vulnerability, but the technical details suggest a high severity due to the potential for sensitive data exposure and privilege escalation.

For European organizations, this vulnerability poses a significant risk to confidentiality and integrity of sensitive data and system security. Organizations with multi-user systems or environments where unprivileged users have local access—such as shared workstations, development machines, or enterprise endpoints—are particularly vulnerable. Exposure of kernel pointers and security tokens can lead to full system compromise if attackers leverage this flaw to escalate privileges. This can result in unauthorized access to sensitive corporate data, disruption of critical services, and potential lateral movement within networks. The ability to bypass KASLR undermines a fundamental kernel security mechanism, increasing the likelihood of successful exploitation of other vulnerabilities. Industrial, governmental, and financial sectors in Europe, which often rely on robust endpoint security, could face increased risk of targeted local attacks. The absence of known exploits in the wild provides a window for proactive mitigation, but the vulnerability's presence in widely deployed drivers could lead to rapid exploitation once public exploit code emerges.

Immediate mitigation should focus on restricting local user access to systems running the vulnerable Ludashi driver. Organizations should implement strict access controls and limit physical and logical access to trusted users only. Monitor and audit usage of IOCTL calls and device interfaces related to the Ludashi driver to detect suspicious activity. Since no official patches are currently available, coordinate with the vendor or driver maintainers for timely updates and apply patches as soon as they are released. Employ endpoint protection solutions capable of detecting anomalous kernel memory access attempts. Consider deploying kernel integrity monitoring tools to detect unauthorized memory mappings or privilege escalation attempts. In environments where patching is delayed, use application whitelisting and privilege separation to reduce the attack surface. Educate users about the risks of local privilege escalation and enforce least privilege principles to minimize potential damage from compromised accounts.