Upstream information

CVE-2021-26311 at MITRE

Description

In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having critical severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 9
Vector AV:N/AC:L/Au:S/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 7.2
Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Access Vector Network
Access Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1186202 [RESOLVED / UPSTREAM]

No SUSE Security Announcements cross referenced.