CVE-2026-50332 in Windows
Summary
by MITRE • 07/14/2026
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical heap-based buffer overflow within the windows kernel that enables local privilege escalation for authenticated attackers. The flaw occurs when the kernel processes user-supplied data without proper bounds checking, allowing malicious input to overwrite adjacent memory regions in the heap allocation structure. Such vulnerabilities typically arise from insufficient input validation mechanisms during kernel-level operations involving memory management functions. The vulnerability falls under the common weakness enumeration CWE-121 which describes heap-based buffer overflow conditions where insufficient boundary checks allow attackers to overwrite heap data structures.
The technical exploitation of this vulnerability requires an authenticated user to execute malicious code that triggers the vulnerable kernel function through legitimate system calls or driver interfaces. Attackers can craft specific input payloads that cause the kernel to allocate memory in a way that overflows into adjacent heap blocks, potentially corrupting critical data structures like process control blocks, kernel objects, or memory management metadata. This corruption can then be leveraged to manipulate kernel execution flow or escalate privileges from user-level to kernel-level access.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with complete system control capabilities including arbitrary code execution, process manipulation, and potential data exfiltration. Once elevated to kernel mode, attackers can bypass all standard operating system security controls and access protected system resources without detection. The vulnerability affects systems where the kernel processes untrusted input from authenticated users, making it particularly dangerous in multi-user environments or when users have legitimate administrative access.
Mitigation strategies should focus on implementing robust input validation at kernel boundaries, enabling exploit protection mechanisms such as kernel address space layout randomization, and maintaining up-to-date system patches from microsoft. organizations should also implement monitoring solutions to detect anomalous kernel behavior and establish privileged access controls to minimize the attack surface. according to the mitre att&ck framework, this vulnerability maps to privilege escalation techniques using kernel exploits, specifically targeting the windows kernel rootkit category and requiring the attacker to have initial access through legitimate user accounts or services. regular security assessments and kernel memory integrity checks can help identify potential exploitation attempts before they succeed in compromising system integrity.