An update for microcode_ctl is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of
 Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The microcode_ctl packages provide microcode updates for Intel and AMD
 processors.

Security Fix(es):

* kernel: local privilege escalation on Intel microcode on Intel(R) Xeon(R)
 (CVE-2023-22655)

* kernel: Local information disclosure on Intel(R) Atom(R) processors
 (CVE-2023-28746)

* kernel: Local information disclosure in some Intel(R) processors
 (CVE-2023-38575)

* kernel: Possible Denial of Service on Intel(R) Processors (CVE-2023-39368)

* kernel: Local information disclosure on Intel(R) Xeon(R) D processors with
 Intel(R) SGX due to incorrect calculation in microcode (CVE-2023-43490)

* intel-microcode: Race conditions in some Intel(R) Processors (CVE-2023-45733)

* intel-microcode: Unexpected behavior in Intel(R) Core(TM) Ultra Processors
 (CVE-2023-46103)

For more details about the security issue(s), including the impact, a CVSS
 score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise
 Linux 9.5 Release Notes linked from the References section.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2023-22655: Protection Mechanism Failure (CWE-693)
CVE-2023-28746: Information Exposure through Microarchitectural State after
 Transient Execution (CWE-1342)
CVE-2023-38575: Non-Transparent Sharing of Microarchitectural Resources
 (CWE-1303)
CVE-2023-39368: Protection Mechanism Failure (CWE-693)
CVE-2023-43490: Incorrect Calculation (CWE-682)
CVE-2023-45733: Exposure of Sensitive Information to an Unauthorized Actor
 (CWE-200)
CVE-2023-46103: Uncontrolled Resource Consumption (CWE-400)