Active Exploitation of Windows Kernel Privilege Escalation Vulnerability CVE-2025-62215

Microsoft has disclosed a critical elevation-of-privilege vulnerability in the Windows Kernel, tracked as CVE-2025-62215, which is being actively exploited in the wild. The flaw arises from a race condition and improper memory management, specifically a double-free scenario, allowing local attackers to escalate privileges to SYSTEM level. Exploitation requires an attacker to already have access to the system, but no user interaction is needed, and the attack can be automated. Microsoft has rated the vulnerability as Important, with a CVSS score of 7.0, and notes that all supported Windows 10 editions are affected, including those under Extended Security Updates (ESU). No workaround is available other than applying the official update, and immediate patching is strongly recommended.

The vulnerability is classified under CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization) and CWE-415 (Double Free), making it a classic post-compromise privilege escalation vector. Attackers can exploit the timing-sensitive memory corruption path in the kernel to gain elevated access, disable security defenses, and move laterally within networks. The attack surface is particularly concerning in enterprise environments where multiple users share access, as any authenticated user can potentially trigger the exploit. Security experts warn that both targeted threat actors and ransomware operators may leverage this flaw to deepen their foothold after initial access, emphasizing the urgency of deploying the security update across all affected systems.