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Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : OpenVPN vulnerabilities (USN-8286-1)

medium Nessus Plugin ID 316075

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8286-1 advisory.

 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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected openvpn package.

See Also

https://ubuntu.com/security/notices/USN-8286-1

Plugin Details

Severity: Medium

ID: 316075

File Name: ubuntu_USN-8286-1.nasl

Version: 1.2

Type: Local

Agent: unix

Published: 5/21/2026

Updated: 6/9/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-40215

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 3.6

Threat Vector: CVSS:4.0/E:U

Vector: 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

CVSS Score Source: CVE-2026-35058

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:openvpn, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/20/2026

Vulnerability Publication Date: 4/22/2026

Reference Information

CVE: CVE-2026-35058, CVE-2026-40215

USN: 8286-1