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CentOS Linux 8.5 [TuxCare] Security Update: microcode_ctl Multiple Vulnerabilities (CENTOS8.5:CLSA-2026:1770214504)

high Nessus Plugin ID 351997

Synopsis

The CentOS Linux host is missing one or more security updates.

Description

The CentOS Linux 8.5 host has a package installed that is affected by multiple vulnerabilities as referenced in the TuxCare CENTOS8.5:CLSA-2026:1770214504 advisory.

 - Improper input validation in UEFI firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access. (CVE-2023-34440, CVE-2024-28127)

 - Improper input validation in UEFI firmware for some Intel(R) processors may allow a privileged user to potentially enable escalation of privilege via local access. (CVE-2023-43758)

 - Improper input validation in XmlCli feature for UEFI firmware for some Intel(R) processors may allow privileged user to potentially enable escalation of privilege via local access. (CVE-2024-24582)

 - Improper input validation in UEFI firmware CseVariableStorageSmm for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access. (CVE-2024-29214)

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 microcode_ctl package based on the guidance in TuxCare advisory CENTOS8.5:CLSA-2026:1770214504.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1770214504

http://www.nessus.org/u?6a874fbd

Plugin Details

Severity: High

ID: 351997

File Name: tuxcare_centos_8.5_CLSA-2026-1770214504.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/30/2026

Updated: 9/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.22

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2023-43758

CVSS v3

Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 5.6

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2024-29214

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party

Exploit Ease: No known exploits are available

Patch Publication Date: 2/4/2026

Vulnerability Publication Date: 2/12/2025

Reference Information

CVE: CVE-2023-34440, CVE-2023-43758, CVE-2024-24582, CVE-2024-28127, CVE-2024-29214

CLSA: 2026:1770214504