An attacker with access to a malicious hypervisor may be able to infer data values used in a SEV guest on AMD CPUs by monitoring ciphertext values over time.
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1033
Source: MITRE
Published: 2022-05-11
Updated: 2022-10-26
Type: CWE-668
Base Score: 2.1
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 3.9
Severity: LOW
Base Score: 6.5
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Impact Score: 4
Exploitability Score: 2
Severity: MEDIUM