CVE-2026-97807 in Windows
Summary
by MITRE • 10/15/2026
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified as a use-after-free condition within the Windows Broadcast DVR User Service represents a critical security flaw that compromises the integrity of privilege escalation controls on affected systems. This specific service, responsible for managing digital video recording and broadcast functionalities, contains memory management errors where pointers to freed memory blocks are not properly invalidated or checked before subsequent access operations occur. When an attacker triggers this condition through carefully crafted inputs, they can manipulate the heap structure to execute arbitrary code within the context of a higher-privileged process, typically SYSTEM level privileges. This flaw is particularly dangerous because it allows for local privilege escalation without requiring physical access to the machine if remote execution vectors are present or if the user has sufficient permissions to interact with the service interfaces.
From a technical perspective, use-after-free vulnerabilities arise when software continues to use a pointer after it has been freed, leading to undefined behavior that can be exploited by malicious actors. In this context, the Broadcast DVR User Service fails to properly manage the lifecycle of certain memory objects allocated during its operation. An authorized attacker who possesses local access and appropriate permissions can exploit this race condition or logical error to overwrite adjacent heap metadata or function pointers. By controlling the content written into these freed memory regions, the attacker can redirect execution flow to shellcode injected into the process address space. This mechanism bypasses standard security mitigations such as Data Execution Prevention (DEP) if combined with other techniques like Return Oriented Programming (ROP), although modern Windows versions include additional protections that may complicate exploitation but do not eliminate the underlying vulnerability class entirely.
The operational impact of this vulnerability is severe, primarily due to its potential for local privilege escalation. Once an attacker successfully exploits this flaw, they gain full control over the operating system with administrative rights equivalent to the SYSTEM account. This level of access allows the compromise of all data stored on the machine, including sensitive corporate information, personal credentials, and cryptographic keys. Furthermore, elevated privileges enable the installation of persistent backdoors, modification of security policies, disabling of antivirus solutions, and lateral movement across networked environments. The presence of this vulnerability significantly increases the attack surface for organizations relying on Windows systems for media recording or broadcasting services, as it provides a direct path from low-privilege user accounts to complete system compromise without requiring additional social engineering or zero-day exploits in other components.
Industry standards classify this type of flaw under CWE-416, which denotes Use After Free vulnerabilities. This classification highlights the importance of proper memory management practices and pointer validation in software development. Additionally, from a tactical perspective aligned with MITRE ATT&CK frameworks, exploitation of this vulnerability falls under techniques associated with privilege escalation, specifically those involving local exploits for elevation of privilege (T1068). The attack vector is typically classified as Local (TA0004), requiring the attacker to have some form of initial access to the target system. Defense-in-depth strategies must therefore focus not only on patching but also on monitoring for suspicious process creation and memory manipulation activities that might indicate an active exploitation attempt against this service.
Mitigation efforts should prioritize immediate application of vendor-provided security updates that address the underlying memory management errors in the Broadcast DVR User Service. Organizations should verify whether the vulnerable component is actively used; if not, disabling or uninstalling the associated services can reduce the attack surface significantly. Implementing strict access controls to limit which users can interact with system services further reduces the risk of exploitation by unauthorized individuals who may have gained initial foothold through other means. Regular vulnerability scanning and patch management cycles are essential to ensure that such known flaws do not remain unaddressed for extended periods, thereby maintaining a robust security posture against local privilege escalation attacks.