usn-8286-1
Vulnerability from osv_ubuntu
Published
2026-05-20 13:16
Modified
2026-08-12 16:46
Summary
openvpn vulnerabilities
Details
Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. (CVE-2026-35058)
Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a previous handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-40215)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35058",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-40215",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvpn",
"binary_version": "2.5.11-0ubuntu0.22.04.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "openvpn",
"purl": "pkg:deb/ubuntu/openvpn@2.5.11-0ubuntu0.22.04.3?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.11-0ubuntu0.22.04.3"
}
],
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35058",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-40215",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvpn",
"binary_version": "2.6.19-0ubuntu0.24.04.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "openvpn",
"purl": "pkg:deb/ubuntu/openvpn@2.6.19-0ubuntu0.24.04.2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.19-0ubuntu0.24.04.2"
}
],
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35058",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-40215",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:25.10"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvpn",
"binary_version": "2.6.19-0ubuntu0.25.10.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "openvpn",
"purl": "pkg:deb/ubuntu/openvpn@2.6.19-0ubuntu0.25.10.2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.19-0ubuntu0.25.10.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.6.13-1ubuntu3",
"2.6.14-1ubuntu1",
"2.6.14-2ubuntu1",
"2.6.14-2ubuntu1.1",
"2.6.19-0ubuntu0.25.10.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2026-35058",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-40215",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:L/SI:N/SA:L",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openvpn",
"binary_version": "2.7.0-1ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "openvpn",
"purl": "pkg:deb/ubuntu/openvpn@2.7.0-1ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.0-1ubuntu1.1"
}
],
"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"
]
}
],
"aliases": [],
"details": "Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter\ndiscovered that OpenVPN incorrectly handled suitably malformed\npackets with valid tls-crypt-v2 keys. An attacker could possibly use\nthis issue to cause OpenVPN to crash, resulting in a denial of\nservice. (CVE-2026-35058)\n\nGuannan Wang, Zhanpeng Liu, and Guancheng Li discovered that\nOpenVPN had a race condition in the TLS handshake process that could\nleak packet data from a previous handshake under certain\ncircumstances. An attacker could possibly use this issue to obtain\nsensitive information. (CVE-2026-40215)",
"id": "USN-8286-1",
"modified": "2026-08-12T16:46:30Z",
"published": "2026-05-20T13:16:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8286-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-35058"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-40215"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "openvpn vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-35058",
"UBUNTU-CVE-2026-40215"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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