# CVE-2023-43758: microcode_ctl: The microcode_ctl packages provide microcode updates for Intel and AMD processors.  Bug Fix(es) and Enhancement(s):...

CVE-2023-43758 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2023-43758, released February 12, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-43758
- Priority: High
- CVSS: 8.2 (Important)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 12, 2025

## Description

The microcode_ctl packages provide microcode updates for Intel and AMD processors.  Bug Fix(es) and Enhancement(s):  * [RHEL 9.5.z] Update Intel CPU microcode to the latest version (JIRA:RHEL-76084)  * microcode_ctl: Improper input validation in UEFI firmware [rhel-9.5.z] (JIRA:RHEL-79223)  * microcode_ctl: Improper input validation in UEFI firmware [rhel-9.5.z] (JIRA:RHEL-79224)  * microcode_ctl: Improper input validation in UEFI firmware CseVariableStorageSmm [rhel-9.5.z] (JIRA:RHEL-79225)  * microcode_ctl: Improper input validation in XmlCli feature for UEFI firmware [rhel-9.5.z] (JIRA:RHEL-79237)  * microcode_ctl: Improper input validation in UEFI firmware [rhel-9.5.z] (JIRA:RHEL-79241)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | intel-microcode Debian 12.15 (bookworm) | 3.20250211.1~deb12u1 | [DEBIAN-CVE-2023-43758](https://patchblox.com/security/data/fix/linux/debian-cve-2023-43758.md) | Feb 12, 2025 |
| Linux | intel-microcode Debian 13.5 (trixie) | 3.20250211.1 | [DEBIAN-CVE-2023-43758](https://patchblox.com/security/data/fix/linux/debian-cve-2023-43758.md) | Feb 12, 2025 |
| Linux | intel-microcode Debian 14 | 3.20250211.1 | [DEBIAN-CVE-2023-43758](https://patchblox.com/security/data/fix/linux/debian-cve-2023-43758.md) | Feb 12, 2025 |
| Linux | microcode_ctl RHEL 8 | 4:20250211-1.el8_10 | [RHEA-2025:3114](https://patchblox.com/security/data/fix/linux/rhea-2025-3114.md) | Mar 24, 2025 |
| Linux | microcode_ctl RHEL 9 | 4:20240910-1.20250211.1.el9_5 | [RHBA-2025:2991](https://patchblox.com/security/data/fix/linux/rhba-2025-2991.md) | Mar 18, 2025 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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