{"id":"CVE-2019-6493","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-6493","generatedAt":"2026-10-27T22:23:35.931Z","title":"SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool that is allocated with user defined bytes and size when IOCTL 0x9C401CC0 is called.","description":"SmartDefragDriver.sys (2.0) in IObit Smart Defrag 6 never frees an executable kernel pool that is allocated with user defined bytes and size when IOCTL 0x9C401CC0 is called. This kernel pointer can be leaked if the kernel pool becomes a \"big\" pool.","published":"2019-04-11T20:29:01.000Z","lastModified":"2026-06-17T02:39:08.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-401"],"affected":["iobit/smart defrag"],"epss":{"score":0.0049,"percentile":0.41881,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.49%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://downwithup.github.io/CVEPosts.html","tags":["Exploit","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.iobit.com/en/iobitsmartdefrag.php","tags":["Product","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://downwithup.github.io/CVEPosts.html","tags":["Exploit","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.iobit.com/en/iobitsmartdefrag.php","tags":["Product","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-6493","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}