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Ubuntu 20.04 LTS / 22.04 LTS / Pro Realtime 22.04 LTS : Linux kernel vulnerability (USN-8730-1)

critical Nessus Plugin ID 343486

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / Pro Realtime 22.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8730-1 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:

 - IPv6 networking;

 - Netfilter;

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-8730-1

Plugin Details

Severity: Critical

ID: 343486

File Name: ubuntu_USN-8730-1.nasl

Version: 1.2

Type: Local

Agent: unix

Published: 9/7/2026

Updated: 9/7/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.5

Percentile: 57.62

CVSS v2

Risk Factor: High

Base Score: 9.7

Temporal Score: 7.2

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

CVSS Score Source: CVE-2026-53131

CVSS v3

Risk Factor: Critical

Base Score: 9.4

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:pro:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1067.69-nvidia-tegra-rt, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1067.69-nvidia-tegra, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1098.106-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1107.109-intel-iot-realtime, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1109.113-ibm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1110.111-nvidia-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1110.111-nvidia, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1111.117-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1114.123-realtime, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1115.125-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-191.201-lowlatency-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-191.201-lowlatency

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/7/2026

Vulnerability Publication Date: 6/25/2026

Reference Information

CVE: CVE-2026-53131

USN: 8730-1