Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-05-27T00:00:00 kernel: KVM: SVM: Add missing save/restore handling of LBR MSRs 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-372

A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) and Secure Virtual Machine (SVM) components. This vulnerability is due to missing save and restore handling for Last Branch Record (LBR) Model Specific Registers (MSRs) and MSR_IA32_DEBUGCTLMSR. A local attacker with access to a virtual machine could potentially exploit this to cause incorrect state restoration of LBRs in nested virtualization environments. This could lead to unexpected behavior or information inconsistencies across virtual machines.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-46014 https://nvd.nist.gov/vuln/detail/CVE-2026-46014 https://lore.kernel.org/linux-cve-announce/2026052745-CVE-2026-46014-5f5a@gregkh/T