{"id":"CVE-2026-11604","aliases":["EUVD-2026-36151","GHSA-f6c5-28vq-94w2"],"status":"published","title":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2...","description":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).","severity":{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00338,"percentile":0.2745,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-122","CWE-131","CWE-787"],"published":"2026-06-10T21:04:37Z","modified":"2026-10-28T02:30:27Z","products":[{"vendor":"openvpn","product":"ovpn-dco-win"}],"references":[{"url":"https://github.com/OpenVPN/ovpn-dco-win/releases","tags":["product","Release Notes","package"]},{"url":"https://community.openvpn.net/Security%20Announcements/CVE-2026-11604","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11604","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-f6c5-28vq-94w2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11604.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-11604","description":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).","status":"published","published":"2026-06-10T21:04:37.141Z","modified":"2026-06-11T13:27:17.336Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"medium","assessor":"cna"}],"cwes":["CWE-131","CWE-122","CWE-787"],"updated_at":"2026-11-02T14:20:04.809935Z"}],"euvd":[{"id":"EUVD-2026-36151","description":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).","status":"published","published":"2026-06-10T21:04:37Z","modified":"2026-06-11T13:27:17Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"medium"}],"updated_at":"2026-11-02T18:20:44.570445Z"}],"ghsa":[{"id":"GHSA-f6c5-28vq-94w2","title":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2...","description":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).","status":"published","published":"2026-06-11T00:32:04Z","modified":"2026-08-11T15:32:52Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/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":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:10:17.573081Z"}],"nvd":[{"id":"CVE-2026-11604","description":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).","status":"published","published":"2026-06-10T22:16:55.643Z","modified":"2026-09-24T14:39:22.383Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/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","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-122","CWE-131","CWE-787"],"updated_at":"2026-11-02T14:12:23.485267Z"}],"osv":[{"id":"CVE-2026-11604","description":"An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).","status":"published","published":"2026-06-10T21:04:37.141Z","modified":"2026-10-28T02:30:27.093364381Z","cvss":[{"version":"4.0","score":5.6,"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","level":"medium"}],"cwes":["CWE-122","CWE-131","CWE-787"],"updated_at":"2026-11-02T15:44:56.675758Z"}]}}