CVE-2024-35250 (Microsoft Windows Kernel-Mode Driver Untrusted Pointer Dereference Vulnerability)

What this vulnerability means in practice

An untrusted pointer dereference in a kernel-mode driver is dangerous because the code runs with high privilege and trusts memory it should not trust. If an attacker can trigger the flaw locally, they may be able to cross the boundary from ordinary user access into kernel-level control, which is why these issues are often treated as high-value privilege-escalation paths.

In Windows, kernel-mode defects matter more than ordinary application bugs because the kernel mediates core system trust. A flaw in that layer can affect process isolation, security product stability, and the integrity of the operating system itself, especially when exploitation becomes reliable enough to support real-world attacks.

How organisations should assess exposure

Exposure checking starts with asset inventory: identify which Windows systems run the affected kernel components, where administrative or local access is already possible, and whether the vulnerable build is present in user endpoints, servers, or high-value administrative workstations. For version and patch status, defer to the vendor advisory and the NIST National Vulnerability Database rather than trying to infer details from the CVE title alone.

Because CISA added this CVE to the KEV catalogue, it should be treated as actively exploited rather than theoretical. The CVE Program is the canonical record for the identifier itself, while KEV status helps security teams prioritise remediation against the systems most likely to be targeted.

Internet exposure is less relevant than for remote flaws, but that does not make the issue low priority. Systems that expose remote access, shared admin sessions, or weak local privilege boundaries can still become practical footholds for an attacker who already has a user context.

Mitigation and containment before full remediation

If patching is delayed, reduce the chance that a low-privilege foothold can reach the vulnerable code path. Limit local administrator rights, harden privileged workstations, and remove unnecessary software that expands kernel attack surface, especially where driver loading or endpoint tamper controls are already weak.

Compensating controls should assume that local exploitation may be attempted after an initial compromise, not just as a standalone attack. Restrict interactive access, monitor for suspicious privilege changes, and keep recovery options ready in case the kernel flaw is used to disable or bypass defensive tooling.

Where operationally feasible, prioritise patching on systems that hold sensitive credentials, administrative sessions, or security tooling, because kernel escalation on those hosts can turn a limited foothold into broader domain or fleet compromise.

Detection and post-exploitation review

After patching, review the system for signs that the vulnerability was used before remediation. Look for unexpected privilege elevation, unusual driver-related crashes, tampering with security tools, and other indicators consistent with local kernel exploitation rather than normal user activity.

Kernel privilege escalation often leaves indirect evidence, so logs alone may be insufficient. A post-patch review should compare endpoint telemetry, security alerts, and process lineage for the period before remediation, then confirm that no attacker retained a higher-privilege position on the host.

Where compromise is suspected, treat the host as potentially exposed to follow-on actions such as credential dumping, tamper events, or lateral movement. The key question is not only whether the bug was fixed, but whether the attacker used it to establish persistence or broaden access.

Risk and Threat Considerations

This vulnerability is especially concerning because a local attacker who already has some level of access may use it to gain kernel-level privilege, which can collapse normal security boundaries on the host. The fact that it is in the KEV catalogue means defenders should assume it has been weaponised in real environments.

Failure mechanism: An untrusted pointer dereference in kernel mode can let attacker-controlled data influence privileged memory access, creating a path to execute code or alter execution state at a level user-mode protections cannot contain.

Impact: Successful exploitation can lead to privilege escalation, security control tampering, and a stronger platform for credential theft or lateral movement if the host is trusted elsewhere in the environment.

Practitioner Guidance

Why practitioners should care: Treat this as a host-integrity and privilege problem, not just a software defect. Kernel-mode exploitation changes the response posture because a compromised endpoint may no longer be trustworthy for ordinary forensic or containment assumptions.

What to watch for: Prioritise high-value Windows systems, especially those used by administrators or hosting security tooling, and verify whether local access pathways are already broader than they need to be. If the host also shows unusual privilege activity, escalate review quickly.

Practitioner takeaway: For KEV-listed local privilege-escalation flaws, speed matters, but so does trust reset, patching alone is not enough if the host may already have been used to gain higher privilege.

Related resources from NHI Mgmt Group

• CVE-2025-24990 (Microsoft Windows Untrusted Pointer Dereference)
• CVE-2024-38107 (Microsoft Windows Power Dependency Coordinator Privilege Escalation)
• CVE-2025-59287 (Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data)
• CVE-2025-32709 (Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free)