USN-8953-1 (UBUNTU-CVE-2026-84790)

Vulnerability from osv_ubuntu – Published: 2026-10-22 15:38 – Updated: 2026-10-22 15:38 – Source website
VLAI
Summary
openvpn vulnerability
Details

It was discovered that OpenVPN incorrectly handled certificate subject fields. A remote authenticated user could possibly use this issue to impersonate other users.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-84790",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.5.11-0ubuntu0.22.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.5.11-0ubuntu0.22.04.6?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.11-0ubuntu0.22.04.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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",
        "2.5.11-0ubuntu0.22.04.5"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-84790",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.6.19-0ubuntu0.24.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.6.19-0ubuntu0.24.04.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.19-0ubuntu0.24.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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",
        "2.6.14-0ubuntu0.24.04.2",
        "2.6.14-0ubuntu0.24.04.3",
        "2.6.19-0ubuntu0.24.04.1",
        "2.6.19-0ubuntu0.24.04.2",
        "2.6.19-0ubuntu0.24.04.3",
        "2.6.19-0ubuntu0.24.04.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-84790",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.7.7-1ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.7.7-1ubuntu1.1?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.7-1ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.0-1ubuntu1",
        "2.7.3-1ubuntu2",
        "2.7.5-1ubuntu2",
        "2.7.5-1ubuntu3",
        "2.7.7-1ubuntu1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-84790",
              "severity": [
                {
                  "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
                  "type": "CVSS_V4"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.7.0-1ubuntu1.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.7.0-1ubuntu1.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.0-1ubuntu1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6.14-2ubuntu1",
        "2.6.15-1ubuntu1",
        "2.7.0~rc5-1ubuntu5",
        "2.7.0~rc6-1ubuntu1",
        "2.7.0-1ubuntu1",
        "2.7.0-1ubuntu1.1",
        "2.7.0-1ubuntu1.2",
        "2.7.0-1ubuntu1.3"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that OpenVPN incorrectly handled certificate subject\nfields. A remote authenticated user could possibly use this issue to\nimpersonate other users.",
  "id": "USN-8953-1",
  "modified": "2026-10-22T15:38:41Z",
  "published": "2026-10-22T15:38:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8953-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-84790"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "openvpn vulnerability",
  "upstream": [
    "UBUNTU-CVE-2026-84790"
  ]
}



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