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CVE-2021-26342 In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| EPYC™ Processors | Versions not published |
Other CVEs of EPYC™ Processors
The 13 CVEs of EPYC™ Processors →
CVE-2021-26388
Improper validation of the BIOS directory may allow for searches to read beyond the directory table copy in RAM,…
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CVE-2021-26376
Insufficient checks in System Management Unit (SMU) FeatureConfig may result in reenabling features potentially…
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CVE-2021-26373
Insufficient bound checks in the System Management Unit (SMU) may result in a system voltage malfunction that could…
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CVE-2021-26348
Failure to flush the Translation Lookaside Buffer (TLB) of the I/O memory management unit (IOMMU) may lead an IO…
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