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overflow","status":"published","published":"2026-09-07T08:16:40Z","modified":"2026-09-08T15:01:45Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","level":"high"}],"updated_at":"2026-11-02T17:28:29.426Z"}],"ghsa":[{"id":"GHSA-6r5j-cp22-59fv","title":"Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated...","description":"Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow","status":"published","published":"2026-09-07T09:31:40Z","modified":"2026-09-07T09:31:47Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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-190"],"updated_at":"2026-11-02T15:11:26.557204Z"}],"nvd":[{"id":"CVE-2026-84732","description":"Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow","status":"published","published":"2026-09-07T09:17:16.84Z","modified":"2026-09-08T19:07:52.113Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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-190"],"updated_at":"2026-11-02T14:12:44.082631Z"}],"osv":[{"id":"ALPINE-CVE-2026-84732","description":"Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow","status":"published","published":"2026-09-07T09:17:16.84Z","modified":"2026-10-01T02:17:49.416960507Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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":"2026-11-02T15:27:50.764331Z"},{"id":"DEBIAN-CVE-2026-84732","description":"Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow","status":"published","published":"2026-09-07T09:17:16.84Z","modified":"2026-10-01T03:03:37.687088413Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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":"2026-11-02T15:46:05.022702Z"},{"id":"OESA-2026-4095","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\nRetransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow(CVE-2026-84732)","status":"published","published":"2026-09-25T01:28:20Z","modified":"2026-09-25T01:45:13.118511294Z","cvss":[{"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":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-4096","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\nRetransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow(CVE-2026-84732)","status":"published","published":"2026-09-25T01:28:20Z","modified":"2026-09-25T01:45:10.361006989Z","cvss":[{"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":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-4097","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\nRetransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow(CVE-2026-84732)","status":"published","published":"2026-09-25T01:28:21Z","modified":"2026-09-25T01:45:13.113577375Z","cvss":[{"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":"2026-11-02T15:52:47.643553Z"},{"id":"UBUNTU-CVE-2026-84732","description":"Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow","status":"published","published":"2026-09-07T09:17:00Z","modified":"2026-10-01T00:22:17.795691999Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","level":"high"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"CLSA-2026-1792649282","title":"Fix CVE(s): CVE-2026-84732","description":"   * SECURITY UPDATE: Remote denial of service via TLS retransmit timeout\n     integer overflow\n     - debian/patches/CVE-2026-84732.patch: cap the exponential backoff of\n       the reliable layer retransmit timeout, limit --tls-timeout and ignore\n       ACKs for packet IDs outside the send window in src/openvpn/options.c,\n       src/openvpn/reliable.c, src/openvpn/reliable.h\n     - CVE-2026-84732\n   * UPDATE CERTIFICATES: Renew sample keys\n     - debian/patches/sample-keys-renew.patch: Renew sample keys for 10 years","status":"published","published":"2026-10-22T06:08:13Z","modified":"2026-10-26T09:32:05.627214784Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"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":"openSUSE-SU-2026:22072-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2026-11771: NTLM proxy auth stack off-by-one write (bsc#1273126).\n- CVE-2026-12932: memory leak using --tls-crypt-v2 (bsc#1273127).\n- CVE-2026-12996: Potential DoS and memory leak via TLS session use-after-free (bsc#1273128).\n- CVE-2026-13117: Heap use-after-free via incomplete guard in check_session_buf_not_used() (bsc#1273129).\n- CVE-2026-13379: Windows interactive service DNS SearchList state pollution (bsc#1273130).\n- CVE-2026-35058: improper validation of packet length can lead to a denial of service (bsc#1267945).\n- CVE-2026-40215: race condition during TLS session promotion can lead to a use-after-free (bsc#1267944).\n- CVE-2026-63650: OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote authenticated users to be misidentified\n  by ignoring the configured X.509 username identity lookup field (bsc#1275310).\n- CVE-2026-84732: Remote Denial of Service via crafted ACK packets (bsc#1279613).\n","status":"published","published":"2026-10-09T12:16:22Z","modified":"2026-10-19T17:23:12.593997822Z","updated_at":"2026-11-02T16:58:42.426393Z"},{"id":"SUSE-SU-2026:24220-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2026-11771: NTLM proxy auth stack off-by-one write (bsc#1273126).\n- CVE-2026-12932: memory leak using --tls-crypt-v2 (bsc#1273127).\n- CVE-2026-12996: Potential DoS and memory leak via TLS session use-after-free (bsc#1273128).\n- CVE-2026-13117: Heap use-after-free via incomplete guard in check_session_buf_not_used() (bsc#1273129).\n- CVE-2026-13379: Windows interactive service DNS SearchList state pollution (bsc#1273130).\n- CVE-2026-35058: improper validation of packet length can lead to a denial of service (bsc#1267945).\n- CVE-2026-40215: race condition during TLS session promotion can lead to a use-after-free (bsc#1267944).\n- CVE-2026-63650: OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote authenticated users to be misidentified\n  by ignoring the configured X.509 username identity lookup field (bsc#1275310).\n- CVE-2026-84732: Remote Denial of Service via crafted ACK packets (bsc#1279613).\n","status":"published","published":"2026-10-09T12:13:13Z","modified":"2026-10-21T17:23:14.847518378Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"SUSE-SU-2026:4213-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2026-63650: OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote authenticated users to be misidentified\n  by ignoring the configured X.509 username identity lookup field (bsc#1275310).\n- CVE-2026-84732: Remote Denial of Service via crafted ACK packets (bsc#1279613).\n","status":"published","published":"2026-09-16T11:53:26Z","modified":"2026-09-16T21:45:07.235912391Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"id":"SUSE-SU-2026:4217-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2026-63650: OpenVPN 2.7_alpha1 through 2.7.5 using mbedTLS allows remote authenticated users to be misidentified\n  by ignoring the configured X.509 username identity lookup field (bsc#1275310).\n- CVE-2026-84732: Remote Denial of Service via crafted ACK packets (bsc#1279613).\n","status":"published","published":"2026-09-16T13:45:27Z","modified":"2026-09-17T09:45:03.943911709Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"id":"SUSE-SU-2026:4242-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issue:\n\n- CVE-2026-84732: Remote Denial of Service via crafted ACK packets (bsc#1279613).\n","status":"published","published":"2026-09-17T11:49:17Z","modified":"2026-09-17T18:23:12.909039301Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"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"}]}}