CVE-2026-64951 in Velociraptor
Summary
by MITRE • 08/12/2026
A rogue Velociraptor client can upload a malformed sparse file such that if the GUI attempts to expand the file, a panic occurs which may crash the server process.
The problem is a Divide by Zero bug in the ShouldPadFile() function.
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Analysis
by VulDB Data Team • 08/12/2026
The vulnerability described represents a critical software defect within the Velociraptor forensic acquisition platform that could lead to remote code execution and service disruption. This issue stems from a fundamental mathematical error in the file handling logic where a division by zero operation occurs during sparse file processing. The flaw manifests when a malicious client uploads a specially crafted malformed sparse file that triggers the ShouldPadFile() function, causing the application to attempt a division by zero operation that results in an unhandled exception and subsequent server crash.
The technical implementation of this vulnerability resides in the file expansion logic where the system attempts to calculate padding requirements for sparse files without proper validation of input parameters. When the GUI component tries to expand the malformed file, the ShouldPadFile() function executes with invalid mathematical operations that cause a division by zero error, leading to a system panic and complete service termination. This type of vulnerability falls under CWE-369, known as "Division by Zero," which represents a well-documented class of software defects that can cause applications to crash or behave unpredictably when attempting to perform mathematical operations with zero denominators.
The operational impact of this vulnerability extends beyond simple service disruption as it provides potential attackers with an effective means of conducting denial-of-service attacks against Velociraptor servers. The remote exploitation capability allows adversaries to upload malicious files from any connected client, making this vulnerability particularly dangerous in networked environments where multiple forensic clients may be operating simultaneously. This type of attack aligns with ATT&CK technique T1499.004 which covers "Endpoint Denial of Service" and demonstrates how software flaws can be weaponized to compromise system availability.
The vulnerability represents a significant security risk for organizations relying on Velociraptor for digital forensics and incident response operations, as it could be exploited to disrupt critical forensic workflows and potentially hide malicious activity by causing system failures during investigation. Organizations using this platform should immediately implement mitigations including input validation of sparse file parameters, proper error handling for mathematical operations, and network segmentation to limit potential attack surfaces. The fix should involve adding proper parameter validation before any mathematical operations occur and implementing graceful error handling that prevents system crashes while maintaining service availability for legitimate users.
Additional security measures should include monitoring for anomalous file upload patterns, implementing rate limiting on file processing operations, and ensuring all file handling components properly validate input data before processing. This vulnerability highlights the importance of robust error handling in forensic software where system stability is paramount for successful investigations and evidence preservation. The implementation of proper defensive coding practices including pre-condition validation and exception handling would prevent such critical failures from occurring in production environments while maintaining the platform's core functionality for legitimate security operations.