{"id":"CVE-2026-40215","state":"PUBLISHED","title":"A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free t","description":"A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.","publishedAt":"2026-06-08T19:59:20.481Z","updatedAt":"2026-06-16T12:24:37.681Z","severity":{"score":6.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L","source":"OpenVPN"},"assigner":"OpenVPN","products":["OpenVPN OpenVPN"],"affected":[{"vendor":"OpenVPN","product":"OpenVPN","defaultStatus":"unaffected","versions":[{"version":"2.6.0","status":"affected","lessThanOrEqual":"2.6.19","versionType":"semver"},{"version":"2.7_alpha1","status":"affected","lessThanOrEqual":"2.7.1","versionType":"semver"}]}],"references":["https://community.openvpn.net/Security%20Announcements/CVE-2026-40215","https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026","https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026"],"weaknesses":["CWE-125","CWE-416"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/40xxx/CVE-2026-40215.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-40215","state":"PUBLISHED","datePublished":"2026-06-08T19:59:20.481Z","dateUpdated":"2026-06-16T12:24:37.681Z","assignerShortName":"OpenVPN","assignerOrgId":"36a55730-e66d-4d39-8ca6-3c3b3017965e","dateReserved":"2026-04-13T10:28:10.354Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion."}],"affected":[{"vendor":"OpenVPN","product":"OpenVPN","defaultStatus":"unaffected","versions":[{"version":"2.6.0","status":"affected","lessThanOrEqual":"2.6.19","versionType":"semver"},{"version":"2.7_alpha1","status":"affected","lessThanOrEqual":"2.7.1","versionType":"semver"}]}],"references":[{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-40215","tags":["vendor-advisory"]},{"url":"https://community.openvpn.net/ReleaseHistory#openvpn-272-released-22-april-2026","tags":["release-notes"]},{"url":"https://community.openvpn.net/ReleaseHistory#openvpn-2620-released-22-april-2026","tags":["release-notes"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"LOW","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.1,"vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125 Out-of-bounds read","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416 Use after free","type":"CWE"}]}],"providerMetadata":{"shortName":"OpenVPN","orgId":"36a55730-e66d-4d39-8ca6-3c3b3017965e","dateUpdated":"2026-06-08T19:59:20.481Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T12:24:29.054100Z","id":"CVE-2026-40215","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-16T12:24:37.681Z"}}]}}}