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AlmaLinux 9.6 [TuxCare] Security Update: microcode_ctl Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1790091171)

high Nessus Plugin ID 353171

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Synopsis

The AlmaLinux host is missing one or more security updates.

Description

The AlmaLinux 9.6 host has a package installed that is affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790091171 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)

 - Improper handling of values for some Intel(R) Processors within Ring 0: Kernel, Hypervisor and Bare Metal OS may allow an escalation of privilege. Authorized adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and require no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (none) impacts. (CVE-2025-35973)

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 ALMALINUX9.6:CLSA-2026:1790091171.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1790091171

http://www.nessus.org/u?7f31f7f8

Plugin Details

Severity: High

ID: 353171

File Name: tuxcare_alma_linux_9.6_CLSA-2026-1790091171.nasl

Version: 1.1

Type: Local

Published: 9/30/2026

Updated: 9/30/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.18

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/OS/extended-third-party, Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 9/22/2026

Vulnerability Publication Date: 2/12/2025

Reference Information

CVE: CVE-2023-34440, CVE-2023-43758, CVE-2024-24582, CVE-2024-28127, CVE-2024-29214, CVE-2025-35973

CLSA: 2026:1790091171