Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-46071

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
27/05/2026
Last modified:
24/06/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12<br /> <br /> svm_copy_lbrs() always marks VMCB_LBR dirty in the destination VMCB.<br /> However, nested_svm_vmexit() uses it to copy LBRs to vmcb12, and<br /> clearing clean bits in vmcb12 is not architecturally defined.<br /> <br /> Move vmcb_mark_dirty() to callers and drop it for vmcb12.<br /> <br /> This also facilitates incoming refactoring that does not pass the entire<br /> VMCB to svm_copy_lbrs().

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.19 (including) 6.18.27 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools