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CVE-2021-26342

Published: May 11, 2022Updated: Nov 21, 2024 Sources: CVE List NVDNVD-CWE-noinfo
NVD MITRE
3.3CVSSLOW
EPSS Score
0.2%
Top 88.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

NVD-CWE-noinfo

Affected Products

epyc 7763 firmwareamdHardware Firmware
epyc 7713p firmwareamdHardware Firmware
epyc 7713 firmwareamdHardware Firmware
epyc 7663 firmwareamdHardware Firmware
epyc 7643 firmwareamdHardware Firmware
amdcommercialUSHardware Firmwareaka advanced micro devices
and 34 more affected products View all →

Exploitability

Official Patch Available

References

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

Timeline

Published
May 11, 2022
Last Updated
Nov 21, 2024

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