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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : Intel Microcode vulnerability (USN-8068-1)

low Nessus Plugin ID 300969

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 host has a package installed that is affected by a vulnerability as referenced in the USN-8068-1 advisory.

 Sergiu Ghetie discovered that some Intel processors did not properly handle values in the microcode flow. A local authenticated user could potentially use this issue to escalate their privileges.

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 intel-microcode package.

See Also

https://ubuntu.com/security/notices/USN-8068-1

Plugin Details

Severity: Low

ID: 300969

File Name: ubuntu_USN-8068-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/5/2026

Updated: 3/5/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Low

Base Score: 2.3

Temporal Score: 1.7

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

CVSS Score Source: CVE-2025-31648

CVSS v3

Risk Factor: Low

Base Score: 3.9

Temporal Score: 3.4

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

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

CVSS v4

Risk Factor: Low

Base Score: 1.8

Threat Score: 0.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:intel-microcode

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/3/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2025-31648

USN: 8068-1