Processor Optimization Removal or Modification of Security-critical Code Affecting microcode_ctl package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-RHEL6-MICROCODECTL-17099679
  • published30 May 2026
  • disclosed12 May 2026

Introduced: 12 May 2026

NewCVE-2025-35979  (opens in a new tab)
CWE-1037  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:6 microcode_ctl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream microcode_ctl package and not the microcode_ctl package as distributed by RHEL. See How to fix? for RHEL:6 relevant fixed versions and status.

Exposure of sensitive information caused by shared microarchitectural predictor state that influences transient execution for some Intel(R) Processors within VMX non-root (guest) operation may allow an information disclosure. Unprivileged software adversary with an authenticated user combined with a high complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (none) and availability (none) impacts.

CVSS Base Scores

version 3.1