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---
title: Plugin: CPU Microcode
---
## Introduction
This plugin reads the sysfs attributes associated with CPU microcode.
It displays a read-only value of the CPU microcode version loaded onto
the physical CPU at fwupd startup.
## GUID Generation
These devices add extra instance IDs from the CPUID values, e.g.
* `CPUID\PRO_0&FAM_06` (only-quirk)
* `CPUID\PRO_0&FAM_06&MOD_0E`
* `CPUID\PRO_0&FAM_06&MOD_0E&STP_3`
## Quirk Use
This plugin uses the following plugin-specific quirks:
### CpuMitigationsRequired
Mitigations required for this specific CPU. Valid values are:
* `gds`
Since: 1.9.4
* `sinkclose`
Since: 2.0.2
### CpuSinkcloseMicrocodeVersion
Minimum version of microcode to mitigate the `sinkclose` vulnerability.
Since: 2.0.2
## External Interface Access
This plugin requires no extra access.
## Version Considerations
This plugin has been available since fwupd version `1.4.0`.
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