{"id":"CVE-2026-84471","aliases":["DEBIAN-CVE-2026-84471","EUVD-2026-101085","GHSA-qpwh-qgw4-8g2c","MGASA-2026-0498","UBUNTU-CVE-2026-84471","USN-8852-1"],"status":"published","title":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2...","description":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","severity":{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00408,"percentile":0.35406,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2026-09-04T00:00:00Z","modified":"2026-10-28T20:17:07Z","fixes":[{"ecosystem":"Debian:14","package":"openvpn","fixed_in":["2.7.7-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"openvpn","fixed_in":["2.5.11-0ubuntu0.22.04.5"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"openvpn","fixed_in":["2.6.19-0ubuntu0.24.04.4"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"openvpn","fixed_in":["2.7.0-1ubuntu1.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.11-1","2.6.12-1","2.6.13-1","2.6.14-0+deb12u1","2.6.14-0+deb12u2","2.6.14-1","2.6.14-2","2.6.15-1","2.6.3-1","2.6.3-1+deb12u1","2.6.3-1+deb12u1~bpo11+1","2.6.3-1+deb12u2","2.6.3-1+deb12u2~bpo11+1","2.6.3-1+deb12u3","2.6.3-1+deb12u4","2.6.3-2","2.6.3-2.1","2.6.7-1","2.6.9-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.14-1","2.6.14-1+deb13u1","2.6.14-1+deb13u2","2.6.14-1+deb13u3","2.6.14-2","2.6.15-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1","2.7.7-1~bpo13+1","2.7.8-1","2.7.8-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.7-1"}]}],"versions":["2.6.14-1","2.6.14-2","2.6.15-1","2.7.0-1","2.7.0-1~bpo13+1","2.7.0~alpha1-1","2.7.0~alpha2-1","2.7.0~alpha3-1","2.7.0~beta1-1","2.7.0~beta2-1","2.7.0~beta3-1","2.7.0~rc1-1","2.7.0~rc2-1","2.7.0~rc2-2","2.7.0~rc3-1","2.7.0~rc4-1","2.7.0~rc5-1","2.7.0~rc6-1","2.7.1-1","2.7.1-1~bpo13+1","2.7.2-1","2.7.2-1~bpo13+1","2.7.3-1","2.7.5-1","2.7.5-1~bpo13+1","2.7.7-1~bpo13+1"]},{"source":"osv","ecosystem":"Mageia:10","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.23-1.mga10"}]}],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.2-4ubuntu1","2.3.2-5ubuntu1","2.3.2-7ubuntu1","2.3.2-7ubuntu2","2.3.2-7ubuntu3","2.3.2-7ubuntu3.1","2.3.2-7ubuntu3.2","2.3.2-7ubuntu3.2+esm1","2.3.2-7ubuntu3.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.7-1ubuntu1","2.3.7-2ubuntu1","2.3.8-1ubuntu1","2.3.10-1ubuntu1","2.3.10-1ubuntu2","2.3.10-1ubuntu2.1","2.3.10-1ubuntu2.2","2.3.10-1ubuntu2.2+esm1","2.3.10-1ubuntu2.2+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3-4ubuntu1","2.4.4-1ubuntu1","2.4.4-2ubuntu1","2.4.4-2ubuntu1.1","2.4.4-2ubuntu1.2","2.4.4-2ubuntu1.3","2.4.4-2ubuntu1.5","2.4.4-2ubuntu1.6","2.4.4-2ubuntu1.7","2.4.4-2ubuntu1.7+esm1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.7-1ubuntu2","2.4.7-1ubuntu2.20.04.2","2.4.7-1ubuntu2.20.04.3","2.4.7-1ubuntu2.20.04.4","2.4.12-0ubuntu0.20.04.1","2.4.12-0ubuntu0.20.04.2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.11-0ubuntu0.22.04.5"}]}],"versions":["2.5.1-3ubuntu1","2.5.1-3ubuntu2","2.5.1-3ubuntu4","2.5.1-3ubuntu5","2.5.5-1ubuntu1","2.5.5-1ubuntu3","2.5.5-1ubuntu3.1","2.5.9-0ubuntu0.22.04.2","2.5.9-0ubuntu0.22.04.3","2.5.11-0ubuntu0.22.04.1","2.5.11-0ubuntu0.22.04.3","2.5.11-0ubuntu0.22.04.4"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.19-0ubuntu0.24.04.4"}]}],"versions":["2.6.5-0ubuntu1","2.6.7-1ubuntu1","2.6.9-1ubuntu2","2.6.9-1ubuntu3","2.6.9-1ubuntu4","2.6.9-1ubuntu4.1","2.6.12-0ubuntu0.24.04.1","2.6.12-0ubuntu0.24.04.3","2.6.14-0ubuntu0.24.04.1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fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","status":"published","published":"2026-10-14T14:29:04.851Z","modified":"2026-10-16T15:31:52.556Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:20:08.391556Z"}],"euvd":[{"id":"EUVD-2026-101085","description":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","status":"published","published":"2026-10-14T14:29:04Z","modified":"2026-10-16T15:31:52Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:00:05.229655Z"}],"ghsa":[{"id":"GHSA-qpwh-qgw4-8g2c","title":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2...","description":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","status":"published","published":"2026-10-14T15:32:30Z","modified":"2026-10-14T15:32:39Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:13:26.117603Z"}],"nvd":[{"id":"CVE-2026-84471","description":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","status":"published","published":"2026-10-14T15:17:26.077Z","modified":"2026-10-16T16:21:51.633Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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":"high","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:12:58.99337Z"}],"osv":[{"id":"DEBIAN-CVE-2026-84471","description":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","status":"published","published":"2026-10-14T15:17:26.077Z","modified":"2026-10-23T17:47:45.0793052Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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":"high"}],"updated_at":"2026-11-02T15:46:04.577397Z"},{"id":"UBUNTU-CVE-2026-84471","description":"The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.","status":"published","published":"2026-09-04T00:00:00Z","modified":"2026-10-28T20:17:07.250962597Z","cvss":[{"version":"4.0","score":7.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"MGASA-2026-0498","title":"Updated openvpn package fixes security vulnerabilities","description":"Improve on check_session_buf_not_used(), catch possible double-free in\nthe lame duck case. (CVE-2026-84471)\nReliability layer: avoid unbounded reliable TLS timeout, and ignore acks\nfor packets that cannot be outstanding. (CVE-2026-84732)\n","status":"published","published":"2026-10-13T01:20:53Z","modified":"2026-10-13T01:30:03.139669008Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"USN-8852-1","title":"openvpn vulnerabilities","description":"It was discovered that OpenVPN had a use-after-free vulnerability in\nits TLS session handling. An attacker could possibly use this issue\nto cause OpenVPN to crash, resulting in a denial of service, or\nexecute arbitrary code. (CVE-2026-84471)\n\nIt was discovered that OpenVPN incorrectly handled retransmissions of\nACK packet IDs, which could trigger a timeout integer overflow. A\nremote attacker could possibly use this issue to cause a denial of\nservice. (CVE-2026-84732)","status":"published","published":"2026-09-30T11:53:54Z","modified":"2026-10-17T12:55:34.2834848Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}