# CVE-2025-35998: microcode_ctl: Missing protection mechanism for alternate hardware interface in the Intel(R) Quick Assist Technology for some Intel(...

CVE-2025-35998 is fixed in microcode_ctl on 1 platform by RHSA-2026:6888 (version 20250211-1.20260227.1.el10_0), released February 10, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-35998
- Priority: High
- CVSS: 7.9 (important)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 10, 2026

## Description

Missing protection mechanism for alternate hardware interface in the Intel(R) Quick Assist Technology for some Intel(R) Platforms within Ring 0: Kernel may allow an escalation of privilege. System software adversary with a privileged user combined with a low 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 requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | microcode_ctl RHEL 10 | 20250211-1.20260227.1.el10_0 | [RHSA-2026:6888](https://patchblox.com/security/data/fix/linux/rhsa-2026-6888.md) | Feb 10, 2026 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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