CVE-2026-62702 in Windows
Summary
by MITRE • 08/11/2026
Null pointer dereference in Windows Graphics Kernel allows an unauthorized attacker to deny service over a network.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/11/2026
A null pointer dereference vulnerability exists within the Windows Graphics Kernel component that can be exploited by unauthorized attackers to execute remote denial of service attacks. This flaw occurs when the graphics kernel fails to properly validate pointer references during graphics processing operations, leading to a situation where a null pointer is accessed and dereferenced without proper checks. The vulnerability specifically affects the Windows operating system's handling of graphics kernel objects and can be triggered through maliciously crafted graphics commands or data streams sent over a network connection. When exploited, this condition causes the graphics kernel to crash or become unresponsive, resulting in system instability and denial of service for legitimate users who rely on graphics processing capabilities.
The technical implementation of this vulnerability involves the graphics kernel's failure to validate input parameters when processing graphics-related requests from remote sources. Attackers can craft malicious graphics data packets that contain null pointers within expected data structures, causing the kernel to attempt dereferencing these invalid memory addresses during normal graphics processing operations. This type of vulnerability falls under the common weakness enumeration CWE-476 which specifically addresses null pointer dereference conditions in software implementations. The attack vector is typically network-based since graphics kernel operations can be initiated through various network protocols that support graphics rendering, including but not limited to those used in remote desktop services or network printing applications.
The operational impact of this vulnerability extends beyond simple service disruption as it affects the core graphics subsystem of Windows operating systems. When the graphics kernel crashes due to null pointer dereference, it can cause cascading failures throughout the system's graphical user interface components, potentially leading to complete system instability. This vulnerability is particularly concerning because graphics processing is fundamental to modern computing environments, affecting everything from desktop applications to server-based graphics rendering services. The denial of service can be persistent and difficult to resolve without system restarts, making it a significant threat to availability in enterprise environments where continuous operation is critical. According to the attack technique framework, this vulnerability aligns with T1499 which covers network denial of service attacks targeting system resources.
Mitigation strategies for this vulnerability should include immediate installation of Microsoft security updates that address the specific null pointer dereference condition within the graphics kernel. System administrators should also implement network segmentation and access controls to limit exposure of graphics processing services to untrusted networks. Additional defensive measures include monitoring for unusual graphics processing activity that might indicate exploitation attempts, implementing network intrusion detection systems with signatures specific to graphics kernel attacks, and configuring firewalls to restrict unnecessary access to graphics-related ports and protocols. The vulnerability demonstrates the importance of proper input validation in kernel-mode drivers as outlined in the secure coding practices recommended by various cybersecurity standards including those from the National Institute of Standards and Technology. Organizations should also consider implementing automated patch management systems to ensure timely deployment of security fixes across all Windows environments, particularly those with remote access capabilities that could be exploited by attackers targeting graphics kernel components.