CVE-2021-26342

Summary

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Affected Software

VendorProductVersion RangeStatus
AMDEPYC™ Processorsvariousaffected

Weaknesses

  • tbd

ADP Enrichment

CVE Program Container

Additional References

References