{"id":"CVE-2025-29824","published":"2025-04-08T18:16:08Z","modified":"2026-06-17T09:05:43Z","title":"Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is a use-after-free condition in the Common Log File System (CLFS) driver of Microsoft Windows. An authorized attacker with local access and low privileges can exploit it to elevate their privileges, requiring no user interaction.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T13:43:51Z"},"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.19254,"percentile":0.97329,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2025-04-08","dueDate":"2025-04-29","ransomware":true,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-29824 ; https://nvd.nist.gov/vuln/detail/CVE-2025-29824","provenance":"source"},"vulncheckKev":{"dateAdded":"2025-04-08","exploitedFirstSeen":"2025-04-08","ransomware":true,"evidence":[{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2025-Apr","date":"2025-04-08"},{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2025-04-08"},{"url":"https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-29824","date":"2025-04-08"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2025-04-08"},{"url":"https://www.microsoft.com/en-us/security/blog/2025/04/08/exploitation-of-clfs-zero-day-leads-to-ransomware-activity/","date":"2025-04-08"},{"url":"https://blog.bushidotoken.net/2025/05/ransomware-tool-matrix-project-updates.html","date":"2025-05-05"},{"url":"https://www.cyfirma.com/research/tracking-ransomware-april-2025/","date":"2025-05-07"},{"url":"https://www.security.com/threat-intelligence/play-ransomware-zero-day","date":"2025-05-07"},{"url":"https://www.ampcuscyber.com/shadowopsintel/cve-2025-29824-the-windows-clfs-zero-day-used-in-ransomware-campaigns/","date":"2025-05-09"},{"url":"https://asec.ahnlab.com/en/88428/","date":"2025-06-10"}],"evidenceTotal":29,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"}],"provenance":"machine"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29824","tags":["Vendor Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-detection-script","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-mitigation-script","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-29824","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local privilege escalation via kernel driver UAF","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an authorized attacker to elevate privileges locally","start":56,"end":115}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1134","name":"Access Token Manipulation","tactics":["privilege-escalation","stealth"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: elevated token from privilege escalation","mappingType":"primary_impact","evidence":[{"from":"description","quote":"allows an authorized attacker to elevate privileges locally","start":56,"end":115}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2025-10122","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-10122","exploited":true,"exploitedSince":"2025-04-08","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":4,"skipped":0,"earliest":"2025-05-14","earliestUrl":"https://github.com/encrypter15/CVE-2025-29824","repos":[{"name":"encrypter15/CVE-2025-29824","url":"https://github.com/encrypter15/CVE-2025-29824","stars":31,"created":"2025-05-14"},{"name":"AfanPan/CVE-2025-29824-Exploit","url":"https://github.com/AfanPan/CVE-2025-29824-Exploit","stars":21,"created":"2025-07-30"},{"name":"zmkeh/CVE-2025-29824-CLFS-Local-privilege-escalation","url":"https://github.com/zmkeh/CVE-2025-29824-CLFS-Local-privilege-escalation","stars":2,"created":"2025-10-27"},{"name":"uname1able/CVE-2025-29824","url":"https://github.com/uname1able/CVE-2025-29824","stars":1,"created":"2026-03-17"}]},"first":{"date":"2025-05-14","source":"PoC-in-GitHub","url":"https://github.com/encrypter15/CVE-2025-29824"},"provenance":"source"},"exploitRefs":["https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-detection-script","https://www.vicarius.io/vsociety/posts/cve-2025-29824-windows-common-log-file-system-driver-elevation-of-privilege-vulnerability-mitigation-script"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1134"],"provenance":"ai"}],"timeline":[{"date":"2025-04-08","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-29824","provenance":"source"},{"date":"2025-04-08","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2025-Apr","provenance":"source"},{"date":"2025-04-08","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2025-04-08","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-10122","provenance":"source"},{"date":"2025-05-14","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/encrypter15/CVE-2025-29824","provenance":"source"}],"speed":{"daysToPublicExploit":36,"firstExploitFrom":"PoC-in-GitHub","daysToKev":0},"priority":{"score":77.9,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck 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