(RHSA-2021:3176) Important: microcode_ctl security, bug fix and enhancement update

The microcode_ctl packages provide microcode updates for Intel.

Security Fixes:

• hw: Vector Register Data Sampling (CVE-2020-0548)

• hw: L1D Cache Eviction Sampling (CVE-2020-0549)

• hw: Special Register Buffer Data Sampling (SRBDS) (CVE-2020-0543)

• hw: Information disclosure issue in Intel SGX via RAPL interface (CVE-2020-8695)

• hw: Vector Register Leakage-Active (CVE-2020-8696)

• hw: Fast forward store predictor (CVE-2020-8698)

• hw: vt-d related privilege escalation (CVE-2020-24489)

• hw: improper isolation of shared resources in some Intel Processors (CVE-2020-24511)

• hw: observable timing discrepancy in some Intel Processors (CVE-2020-24512)

Bug Fix(es):

• [rhel-8.1.0.z] Re-enable 06-5e-03 (SKL-H/S, CPUID 0x506e3) latest microcode updates (BZ#1972327)

• [rhel-8.1.0.z] Re-enable 06-8c-01 (TGL-UP3/UP4, CPUID 0x806c1) latest microcode updates (BZ#1972331)