VulnerabilityModified
CVE-2021-26340
A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).
HIGH 8.4EPSS 0.24%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).
- CVSS 3.1
- 8.4 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Affected
- amd/epyc 7001 firmware · amd/epyc 7232p firmware · amd/epyc 7251 firmware · amd/epyc 7261 firmware · amd/epyc 7252 firmware · amd/epyc 74f3 firmware · amd/epyc 7501 firmware · amd/epyc 7502 firmware · amd/epyc 7502p firmware · amd/epyc 7513 firmware · amd/epyc 7532 firmware · amd/epyc 7542 firmware · amd/epyc 7543 firmware · amd/epyc 7543p firmware · amd/epyc 7551 firmware · amd/epyc 7551p firmware · amd/epyc 7552 firmware · amd/epyc 75f3 firmware · amd/epyc 7601 firmware · amd/epyc 7642 firmware · +40 more
- Source
- psirt@amd.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.