Windows Common Log File System Driver Out-of-Bounds Read (CVE-2023-36424)

Historical catalog analysis: CISA added this entry on April 13, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2023-36424 is an out-of-bounds read vulnerability (CWE-125) located within the Microsoft Windows Common Log File System Driver. According to reported data, this flaw could be leveraged by a threat actor to achieve privilege escalation on an affected system.

Exposure and applicability

This vulnerability affects systems running Microsoft Windows that utilize the Common Log File System Driver. Because the impact is privilege escalation, the primary risk is to environments where low-privileged users or compromised service accounts have access to the driver, potentially allowing them to elevate their permissions to a higher level of authority within the operating system.

Remediation priorities

Based on our analysis, vulnerability management teams should prioritize remediation based on the following hierarchy:

1. Vendor Mitigations: The primary corrective action is the application of mitigations as specified in Microsoft’s vendor instructions.
2. Cloud Service Alignment: For organizations utilizing cloud services, alignment with BOD 22-01 guidance is recommended to ensure consistent exposure reduction across virtualized infrastructure.
3. Asset Decommissioning: In scenarios where vendor mitigations are unavailable or cannot be applied due to legacy constraints, the source suggests discontinuing use of the affected product.

How to validate remediation

Verification must move beyond simple version checks, as a deployed patch does not inherently guarantee that the vulnerability is mitigated in the active runtime environment. To verify that exposure has been reduced, defenders should:

• Confirm Mitigation State: Verify through system configuration audits that the specific vendor-recommended mitigations are active and enforced.
• Validate Driver Integrity: Ensure the Common Log File System Driver version matches the remediated baseline across all targeted endpoints.
• Cross-Reference Cloud Baselines: For cloud assets, validate that the environment adheres to the required security configurations outlined in relevant guidance.

Limits and open questions

It remains unknown whether this vulnerability has been utilized in known ransomware campaigns. Furthermore, while vendor mitigations are available, there is residual risk if those mitigations are improperly applied or if complementary system hardening is absent. Defenders should note that the date of inclusion in the CISA Known Exploited Vulnerabilities catalog does not necessarily represent the original disclosure date of the flaw.

Source and editorial note

CVE-2023-36424: Microsoft Windows Out-of-Bounds Read Vulnerability · Source date: April 13, 2026 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: April 16, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 15, 2026 at 00:05 UTC.

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