# CVE-2026-20898: microcode_ctl: [4:20260812-1.0.3] - disable late update for 06-ad-01 - add support for UEK7/UEK8 and ueknext kernels - don't bother...

CVE-2026-20898 is fixed in microcode_ctl on 1 platform, first by ELSA-2026-500239, released September 16, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-20898
- Priority: High
- CVSS: 7.2 (IMPORTANT)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2026

## Description

[4:20260812-1.0.3] - disable late update for 06-ad-01 - add support for UEK7/UEK8 and ueknext kernels - don't bother calling dracut if virtualized [Orabug: 35710077] - ensure UEK also rebuilds initramfs [Orabug: 34280058] - add support for UEK7 kernels - enable early update for 06-4f-01 - remove no longer appropriate caveats for 06-2d-07 and 06-55-04 - enable early and late load on RHCK  [4:20260812-1] - Update Intel CPU microcode to microcode-20260812 release (RHEL-240770) - Security advisories:   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01379.html   CVE-2025-31936   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01404.html   CVE-2025-31938   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01423.html   CVE-2026-20917   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01428.html   CVE-2025-35973   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01435.html   CVE-2026-20716   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01441.html   CVE-2026-20760   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01442.html   CVE-2026-20713, CVE-2026-20901   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01443.html   CVE-2026-20707 - New microcode files (in hex):   06-b7-04: Raptor Lake: revision 0137   06-d5-01: Wildcat Lake: revision 000c   06-d7-00: Bartlett Lake: revision 0137 - Microcode files (/platform_mask shown) with revision updates (in hex):   06-6a-06/87: Ice Lake-X: d000421 to d000433   06-6c-01/10: Ice Lake-D: 10002f1 to 1000301   06-7e-05/80: Ice Lake-L: 00cc to 00ce   06-8f-07/87: Sapphire Rapids: 2b000670 to 2b000685   06-8f-08/10: Sapphire Rapids with HBM: 2c000421 to 2c000435   06-8f-08/87: Sapphire Rapids: 2b000670 to 2b000685   06-a7-01/02: Rocket Lake: 0065 to 0066   06-ad-01/20: Granite Rapids-X: a000142 to a000151   06-ad-01/95: Granite Rapids-X: 1000423 to 1000434   06-ae-01/97: Granite Rapids-D: 1000307 to 1000309   06-af-03/01: Crestmont (Sierra Forest): 30003a3 to 30003b2   06-b5-00/80: Arrow Lake-U: 000d to 000e   06-b7-01/36: Raptor Lake: 0133 to 0137, platform bit 04 added   06-bd-01/80: Lunar Lake: 0126 to 0128   06-c5-02/82: Arrow Lake-H: 0121 to 0122   06-c6-02/82: Arrow Lake: 0121 to 0122   06-cc-02/94: Panther Lake: 011b to 011c, platform bit 04 added, also used for 06-e5-02   06-cc-03/94: Panther Lake: 011b to 011c, platform bit 04 added, also used for 06-e5-02   06-cf-02/87: Emerald Rapids: 210002e0 to 210002f4 Resolves: RHEL-240770

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | microcode_ctl ol 10 | 4:20260812-1.0.2.el9_8 | [ELSA-2026-500239](https://patchblox.com/security/data/fix/linux/elsa-2026-500239.md) | Sep 16, 2026 |
| Linux | microcode_ctl ol 8 | 4:20260812-1.0.2.el9_8 | [ELSA-2026-500239](https://patchblox.com/security/data/fix/linux/elsa-2026-500239.md) | Sep 16, 2026 |
| Linux | microcode_ctl ol 9 | 4:20260812-1.0.2.el9_8 | [ELSA-2026-500239](https://patchblox.com/security/data/fix/linux/elsa-2026-500239.md) | Sep 16, 2026 |

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Data as of 2026-11-08T06:59:42Z 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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