A vulnerability scan report reveals the following Common Vulnerabilities and Exposures (CVE's) related to USN-6967-1: Intel Microcode vulnerabilities.
These CVE's are related to hardware level (processors). TAS/TANZU stemcell(s) (Xenial Stemcells -- 621.x) could possibly be effected by this.
Xenial Stemcells reached EOGS (end of general support) in April 2024 and no new stemcells are planned for Xenial.
The fix is included in the Jammy v1.572 stemcell.
https://docs.vmware.com/en/Stemcells-for-VMware-Tanzu/services/release-notes/stemcells.html#621-line:~:text=ubuntu%2Djammy/v1.613-,1.572,-Release%20Date%3A%20September