CVE-2026-46071

low Red Hat
CVSS v3 Base Score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 27, 2026 (44 days ago)
Last Modified: May 27, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) subsystem, specifically affecting its nested virtualization (nSVM) capabilities. The issue arises from incorrect handling of Virtual Machine Control Block Last Branch Record (VMCB_LBR) data when copied to vmcb12, an operation that is not architecturally defined. This can lead to unexpected behavior or instability within nested virtualized environments, potentially impacting the reliability of guest virtual machines.

CWE

CWE-440

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org