low3.3
CVE-2021-26342
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 ne…
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Amd | Epyc 7763 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7713p Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7713 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7663 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7643 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 75f3 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7543p Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7543 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7513 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7453 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 74f3 Firmware | before milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7443p Firmware | before milanpi-sp3_1.0.0.7 |