{"id":"CVE-2026-13698","aliases":["ALPINE-CVE-2026-13698","DEBIAN-CVE-2026-13698","EUVD-2026-41877","GHSA-rwhm-c36w-484h","MGASA-2026-0236","OESA-2026-2917","OESA-2026-2918","OESA-2026-3001","OESA-2026-3784","SUSE-SU-2026:3407-1","UBUNTU-CVE-2026-13698","openSUSE-SU-2026:21488-1"],"status":"published","title":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1...","description":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of 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16.0","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.10-160000.4.1"}]}],"bundled":2}],"products":[{"vendor":"openvpn","product":"openvpn"}],"references":[{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-13698","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13698","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-rwhm-c36w-484h"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-13698","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13698.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-13698","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0236.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35840","tags":["report"]},{"url":"https://github.com/OpenVPN/openvpn/releases/tag/v2.6.21","tags":["web"]},{"url":"https://lists.debian.org/debian-security-announce/2026/msg00287.html","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3GB3J43NMV2S6RIUKB3FSX5H6RA4KP7/","tags":["web"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2917","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11771","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12932","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12996","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13117","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13122","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2918","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3001","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3784","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263407-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1270413","tags":["report"]},{"url":"https://bugzilla.suse.com/1270414","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-13122","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-13698","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-13698","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-13698","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8540-1","tags":["advisory"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-13698","description":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service","status":"published","published":"2026-07-06T14:13:49.479Z","modified":"2026-07-06T15:28:16.081Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-401","CWE-770"],"updated_at":"2026-11-02T14:19:49.885652Z"}],"euvd":[{"id":"EUVD-2026-41877","description":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service","status":"published","published":"2026-07-06T14:13:49Z","modified":"2026-07-06T15:28:16Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:13.172179Z"}],"ghsa":[{"id":"GHSA-rwhm-c36w-484h","title":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1...","description":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service","status":"published","published":"2026-07-06T15:30:48Z","modified":"2026-07-09T15:32:20Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T15:09:21.623271Z"}],"nvd":[{"id":"CVE-2026-13698","description":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of 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Starting with the fundamental premise that complexity is the enemy of security,  OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-adapted for the SME and enterprise markets.\r\n\r\nSecurity Fix(es):\n\n(CVE-2026-11771)\n\n(CVE-2026-12932)\n\n(CVE-2026-12996)\n\n(CVE-2026-13117)\n\nOpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled(CVE-2026-13122)\n\nA memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service(CVE-2026-13698)","status":"published","published":"2026-07-09T11:11:49Z","modified":"2026-08-18T01:21:15.921502799Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-2918","title":"openvpn security update","description":"OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations,  including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing,  failover, and fine-grained access-controls. Starting with the fundamental premise that complexity is the enemy of security,  OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-adapted for the SME and enterprise markets.\r\n\r\nSecurity Fix(es):\n\n(CVE-2026-11771)\n\n(CVE-2026-12932)\n\n(CVE-2026-12996)\n\n(CVE-2026-13117)\n\nOpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled(CVE-2026-13122)\n\nA memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service(CVE-2026-13698)","status":"published","published":"2026-07-09T11:11:49Z","modified":"2026-08-18T01:21:15.759682823Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-3001","title":"openvpn security update","description":"OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations,  including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing,  failover, and fine-grained access-controls. Starting with the fundamental premise that complexity is the enemy of security,  OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-adapted for the SME and enterprise markets.\r\n\r\nSecurity Fix(es):\n\n(CVE-2026-11771)\n\n(CVE-2026-12932)\n\n(CVE-2026-12996)\n\n(CVE-2026-13117)\n\nOpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled(CVE-2026-13122)\n\nA memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service(CVE-2026-13698)","status":"published","published":"2026-07-19T11:11:54Z","modified":"2026-08-18T01:21:18.126218404Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"OESA-2026-3784","title":"openvpn security update","description":"OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations,  including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing,  failover, and fine-grained access-controls. Starting with the fundamental premise that complexity is the enemy of security,  OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-adapted for the SME and enterprise markets.\r\n\r\nSecurity Fix(es):\n\nA use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry(CVE-2026-12996)\n\nA memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service(CVE-2026-13698)","status":"published","published":"2026-09-14T16:34:19Z","modified":"2026-09-13T16:45:39.219069008Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"UBUNTU-CVE-2026-13698","description":"A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-crypt-v2 client key to potentially cause a denial of service","status":"published","published":"2026-07-06T15:16:00Z","modified":"2026-07-14T23:30:20.972725219Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:00.592716Z"},{"id":"MGASA-2026-0236","title":"Updated openvpn packages fix security vulnerabilities","description":"The updated packages fix security vulnerabilities:\nPossible 1-byte buffer overrun on NTLMv2 proxy responses.\n(CVE-2026-11771)\nMemory-leak in tls-crypt-v2 client key handling that could lead to\nout-of-memory situations and subsequent server crashes. (CVE-2026-12932)\nUse-after-free bug in ack_write_buf(), triggerable by a well-timed\nsequence of control channel + authentication packets. (CVE-2026-12996)\nUse-after-free bug in tls_wrap_reneg(), triggerable by suitable sequence\nof dynamic tls-crypt control-channel packets. (CVE-2026-13117)\nServer crash on reception of suitably malformed auth-token, if\n--auth-gen-token external-auth is active. (CVE-2026-13122)\nAnother memory leak on reception of suitable tls-crypt-v2 packets that\ncould lead to an out of memory situation and server crash.\n(CVE-2026-13698)\n","status":"published","published":"2026-07-08T16:36:03Z","modified":"2026-07-08T16:45:05.314177777Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:21488-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2026-13122: denial of service via a malformed authentication token that triggers a reachable assertion when\n  external-auth is enabled (bsc#1270413).\n- CVE-2026-13698: denial of service via memory leak triggered by remote attackers with a valid tls-crypt-v2 client key\n  (bsc#1270414).\n","status":"published","published":"2026-07-30T10:38:17Z","modified":"2026-07-31T18:24:10.595510106Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"SUSE-SU-2026:3407-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2026-13122: denial of service via a malformed authentication token that triggers a reachable assertion when\n  external-auth is enabled (bsc#1270413).\n- CVE-2026-13698: denial of service via memory leak triggered by remote attackers with a valid tls-crypt-v2 client key\n  (bsc#1270414).\n","status":"published","published":"2026-07-29T11:10:52Z","modified":"2026-07-30T17:15:10.482920209Z","updated_at":"2026-11-02T15:54:04.987808Z"}]}}