Medium: microcode_ctl

Issue Overview:

A flaw was found in hw. The APIC can operate in xAPIC mode (also known as a legacy mode), in which APIC configuration registers are exposed through a memory-mapped I/O (MMIO) page. This flaw allows an attacker who can execute code on a target CPU to query the APIC configuration page. When reading the APIC configuration page with an unaligned read from the MMIO page, the registers may return stale data from previous requests made by the same processor core to the same configuration page, leading to unauthorized access. (CVE-2022-21233)

Affected Packages:

microcode_ctl

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update microcode_ctl to update your system.

New Packages:

i686:  
    microcode_ctl-2.1-47.amzn2.0.13.i686  
    microcode_ctl-debuginfo-2.1-47.amzn2.0.13.i686  
  
src:  
    microcode_ctl-2.1-47.amzn2.0.13.src  
  
x86_64:  
    microcode_ctl-2.1-47.amzn2.0.13.x86_64  
    microcode_ctl-debuginfo-2.1-47.amzn2.0.13.x86_64  

Additional References

Red Hat: CVE-2022-21233

Mitre: CVE-2022-21233