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DEBIAN-CVE-2026-40215

Type: advisorySource: OSV1 source record

A race condition in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-40215

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-40215

openvpn

Source reference: /affected/0/package/name

Affected versions
2.6.11-1

Source reference: /affected/0/versions

2.6.12-1

Source reference: /affected/0/versions

2.6.13-1

Source reference: /affected/0/versions

2.6.3-1

Source reference: /affected/0/versions

2.6.3-1+deb12u1

Source reference: /affected/0/versions

2.6.3-1+deb12u1~bpo11+1

Source reference: /affected/0/versions

2.6.3-1+deb12u2

Source reference: /affected/0/versions

2.6.3-1+deb12u2~bpo11+1

Source reference: /affected/0/versions

2.6.3-1+deb12u3

Source reference: /affected/0/versions

2.6.3-1+deb12u4

Source reference: /affected/0/versions

2.6.3-2

Source reference: /affected/0/versions

2.6.3-2.1

Source reference: /affected/0/versions

2.6.7-1

Source reference: /affected/0/versions

2.6.9-1

Source reference: /affected/0/versions

Fixed versions
2.6.14-0+deb12u1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

openvpn

Source reference: /affected/1/package/name

Affected versions
2.6.14-1

Source reference: /affected/1/versions

2.6.14-1+deb13u1

Source reference: /affected/1/versions

Fixed versions
2.6.14-1+deb13u2

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

openvpn

Source reference: /affected/2/package/name

Affected versions
2.6.14-1

Source reference: /affected/2/versions

2.6.14-2

Source reference: /affected/2/versions

2.6.15-1

Source reference: /affected/2/versions

2.7.0-1

Source reference: /affected/2/versions

2.7.0-1~bpo13+1

Source reference: /affected/2/versions

2.7.0~alpha1-1

Source reference: /affected/2/versions

2.7.0~alpha2-1

Source reference: /affected/2/versions

2.7.0~alpha3-1

Source reference: /affected/2/versions

2.7.0~beta1-1

Source reference: /affected/2/versions

2.7.0~beta2-1

Source reference: /affected/2/versions

2.7.0~beta3-1

Source reference: /affected/2/versions

2.7.0~rc1-1

Source reference: /affected/2/versions

2.7.0~rc2-1

Source reference: /affected/2/versions

2.7.0~rc2-2

Source reference: /affected/2/versions

2.7.0~rc3-1

Source reference: /affected/2/versions

2.7.0~rc4-1

Source reference: /affected/2/versions

2.7.0~rc5-1

Source reference: /affected/2/versions

2.7.0~rc6-1

Source reference: /affected/2/versions

2.7.1-1

Source reference: /affected/2/versions

2.7.1-1~bpo13+1

Source reference: /affected/2/versions

2.7.2-1~bpo13+1

Source reference: /affected/2/versions

Fixed versions
2.7.2-1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.6.14-0+deb12u1"
          }
        ]
      }
    ],
    "package": {
      "name": "openvpn",
      "purl": "pkg:deb/debian/openvpn?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.6.11-1",
      "2.6.12-1",
      "2.6.13-1",
      "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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40215.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.6.14-1+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "openvpn",
      "purl": "pkg:deb/debian/openvpn?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.6.14-1",
      "2.6.14-1+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40215.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.7.2-1"
          }
        ]
      }
    ],
    "package": {
      "name": "openvpn",
      "purl": "pkg:deb/debian/openvpn?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "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~bpo13+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40215.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56011 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement