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Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : Linux kernel vulnerability (USN-8659-1)

high Nessus Plugin ID 340679

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8659-1 advisory.

 A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystems:

 - Open vSwitch;

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

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

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-8659-1

Plugin Details

Severity: High

ID: 340679

File Name: ubuntu_USN-8659-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/26/2026

Updated: 8/26/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.36

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-64531

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:canonical:ubuntu_linux:pro:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1011.11-aws-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1011.11-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1011.11-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1012.12-ibm, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1017.17-raspi-realtime, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1017.17-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-30.30.1-realtime-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-30.30.1-realtime

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/20/2026

Vulnerability Publication Date: 7/27/2026

Reference Information

CVE: CVE-2026-64531

USN: 8659-1