Microsoft Finally Patches 2-Year-Old Windows Kernel Security Flaw

Microsoft has released a critical patch for a 2-year-old Windows kernel security vulnerability.

This vulnerability, identified as CVE-2025-24983, allows attackers to exploit a weakness in the Windows Win32 Kernel Subsystem, leading to an elevation of privilege.

The patch comes after extensive research by security experts, who first detected the exploit in the wild in March 2023.

#ESETresearch has discovered a zero day exploit abusing #CVE-2025-24983 vulnerability in Windows Kernel to elevate privileges (#LPE). First seen in the wild in March 2023, the exploit was deployed through #PipeMagic backdoor on the compromised machines. 1/4 pic.twitter.com/qCOgYiltfs

— ESET Research (@ESETresearch) March 11, 2025

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Understanding the Vulnerability

CVE-2025-24983 is categorized as an elevation of privilege vulnerability, classified with a severity rating of “Important.”

It falls under the Common Weakness Enumeration (CWE-416), which involves the use of memory after it has been freed.

This type of vulnerability is particularly dangerous because it can allow attackers to execute malicious code, potentially leading to complete system compromise.

The vulnerability’s CVSS score is 7.0 (in CVSS v3.1), indicating its significant impact. The vector string breaks down the vulnerability further:

• Attack Vector: Local (AV:L) – The vulnerability requires local access to the system.
• Attack Complexity: High (AC:H) – Exploiting this vulnerability requires advanced skills.
• Privileges Required: Low (PR:L) – Only basic privileges are needed to exploit the vulnerability.
• User Interaction: None (UI:N) – No user action is required to trigger the exploit.
• Scope: Unchanged (S:U) – The vulnerability does not extend privileges beyond the local system.
• Confidentiality, Integrity, Availability: High (C:H, I:H, A:H) – The exploit can significantly impact all three security pillars.

Exploitation and Impact

The vulnerability was initially exploited in the wild by deploying a backdoor named PipeMagic on compromised systems.

This backdoor facilitated the elevation of privileges, granting attackers control over the compromised machines without needing additional permissions.

The exploit’s maturity is listed as functional, indicating that viable exploit code exists and has been successfully used.

Microsoft has officially addressed CVE-2025-24983 through a security update. Users and organizations are advised to apply this patch immediately to prevent potential exploitation.

The remediation level is classified as “Official Fix,” meaning that updating Windows with the latest patches is the most effective way to secure systems against this vulnerability.

The patching of CVE-2025-24983 marks an important step in securing Windows systems from a dangerous and long-standing vulnerability.

 It highlights the importance of regular software updates and effective cybersecurity measures to protect against evolving threats.

As the threat landscape continues to evolve, maintaining up-to-date systems remains a key defense strategy for ensuring digital security.

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