{"id":"CVE-2018-9336","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-9336","generatedAt":"2026-10-28T21:18:50.805Z","title":"openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service.","description":"openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have unspecified other impact including privilege escalation.","published":"2018-05-01T18:29:01.000Z","lastModified":"2026-06-17T02:06:25.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.8,"severity":"HIGH","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-415"],"affected":["openvpn/openvpn","slackware/slackware linux"],"epss":{"score":0.00587,"percentile":0.47874,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6","tags":["Release Notes","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.tenable.com/security/research/tra-2018-09","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79b","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6","tags":["Release Notes","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/research/tra-2018-09","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-9336","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."}