CVE-2026-70041 in Windows
Summary
by MITRE • 10/14/2026
Buffer over-read in Windows CD-ROM Driver allows an authorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified as CVE-2024-30157 represents a critical security flaw within the Microsoft Windows CD-ROM driver, specifically affecting systems running versions prior to Windows 10 version 22H2 and earlier builds of Windows Server. This issue stems from an improper handling of memory operations during data retrieval processes associated with optical media devices. The core technical deficiency lies in the driver's failure to correctly validate buffer boundaries when reading data from a CD-ROM device, leading to a classic out-of-bounds read condition. When the operating system interacts with the storage subsystem to access information stored on an inserted disc, the flawed logic allows the application or kernel-mode component to read memory locations that lie beyond the allocated buffer space. This behavior is characteristic of CWE-125, which defines Out-of-Bounds Read vulnerabilities where software reads data past the end or before the beginning of the intended buffer.
The operational impact of this vulnerability centers on local information disclosure rather than remote code execution or privilege escalation in its direct form. Because the flaw resides within a kernel-mode driver, an attacker who has already gained authenticated access to the system can exploit this memory corruption to leak sensitive data from adjacent memory regions. This disclosed information may include cryptographic keys, session tokens, internal operating system structures, or other confidential data residing in the process space of privileged applications. The ability to read arbitrary kernel memory significantly compromises the confidentiality guarantees provided by the Windows security model. While the vulnerability itself does not directly allow for code execution, it serves as a powerful primitive that can be chained with other vulnerabilities to achieve higher levels of compromise, such as full system control or persistence mechanisms that rely on stealing credentials from memory dumps or active processes.
From an offensive security perspective, this flaw aligns closely with MITRE ATT&CK technique T1003, specifically the OS Credential Dumping sub-techniques like LSASS Memory access (T1003.001) or Process Memory Stealing (T1005). Attackers typically leverage such memory disclosure vulnerabilities to extract plaintext passwords, NTLM hashes, Kerberos tickets, and other authentication material stored in volatile memory. The presence of this vulnerability lowers the barrier for attackers who have achieved initial access through phishing, exploit kits, or physical access, as it provides a reliable method for escalating their foothold by harvesting credentials that are otherwise protected from standard user-mode applications due to Windows Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) protections.
Mitigation strategies primarily involve applying the latest security updates provided by Microsoft, which patch the buffer validation logic within the cdrom.sys driver file. Organizations should prioritize deploying these patches across all endpoints and servers that utilize optical drives or have legacy drivers installed. In environments where immediate patching is not feasible due to compatibility concerns, network segmentation can help limit lateral movement if an attacker gains initial access. Additionally, enabling advanced endpoint detection and response (EDR) solutions with memory protection capabilities may detect anomalous read patterns associated with this exploitation attempt. Regular auditing of driver signatures and disabling unused hardware interfaces like CD-ROM drives when not in use further reduces the attack surface by eliminating potential vectors for triggering the vulnerable code paths within the kernel subsystem.