CVE-2021-26342

State: Published
Severity: Not scored
Published: May 11, 2022
Updated: Sep 16, 2024
Reserved: Jan 29, 2021

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
EPYC™ ProcessorsAMD	variousAffected

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

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