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Rocky Linux 9 [CIQ] Security Update: microcode_ctl (crlsa-2026_97521)

medium Nessus Plugin ID 381165

Synopsis

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

Description

The Rocky Linux 9 host has a package installed that is affected by a vulnerability as referenced in the CIQ crlsa-2026_97521 advisory.

 * kernel: hypervisor: Intel Processors: Privilege escalation in Ring 0 via improper value handling (CVE-2025-35973)

 Bug Fix(es) and Enhancement(s):

 * [Rocky Linux 9] Update Intel CPU microcode to the latest version (JIRA:Rocky Linux-240771)

Tenable has extracted the preceding description block directly from the CIQ 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 microcode_ctl package based on the guidance in CIQ advisory crlsa-2026_97521.

See Also

https://access.redhat.com/errata/RHSA-2026:97521

https://bugzilla.redhat.com/show_bug.cgi?id=2514104

https://errata.build.resf.org/RLSA-2026:97521

http://www.nessus.org/u?0eab9cfe

http://www.nessus.org/u?54221973

Plugin Details

Severity: Medium

ID: 381165

File Name: ciq_rocky_linux_9_crlsa-2026_97521.nasl

Version: 1.1

Type: Local

Published: 11/14/2026

Updated: 11/14/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 57.82

Vendor

Vendor Severity: Unknown

CVSS v2

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 3.9

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

CVSS Score Source: CVE-2025-35973

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

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

CVSS v4

Risk Factor: Medium

Base Score: 4.5

Threat Score: 0.9

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:H/SI:H/SA:N

Vulnerability Information

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/13/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2025-35973