CVE-2018-9336
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.
Does this matter?
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.
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.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.59% probability · 48th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- openvpn/openvpn · slackware/slackware linux
- Source
- cve@mitre.org
EPSS 0.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761Mailing List, Third Party Advisory
- https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24Release Notes, Vendor Advisory
- https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79bPatch, Third Party Advisory
- https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6Release Notes, Third Party Advisory
- https://www.tenable.com/security/research/tra-2018-09Exploit, Third Party Advisory
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.568761Mailing List, Third Party Advisory
- https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24Release Notes, Vendor Advisory
- https://github.com/OpenVPN/openvpn/commit/1394192b210cb3c6624a7419bcf3ff966742e79bPatch, Third Party Advisory
- https://github.com/OpenVPN/openvpn/releases/tag/v2.4.6Release Notes, Third Party Advisory
- https://www.tenable.com/security/research/tra-2018-09Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.