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

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CVE-2026-31591

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
24/04/2026
Last modified:
28/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish<br /> <br /> Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as<br /> allowing userspace to manipulate and/or run a vCPU while its state is being<br /> synchronized would at best corrupt vCPU state, and at worst crash the host<br /> kernel.<br /> <br /> Opportunistically assert that vcpu-&gt;mutex is held when synchronizing its<br /> VMSA (the SEV-ES path already locks vCPUs).

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:*:*:*:*:*:*:*:* 6.11 (including) 6.18.24 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.14 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 7.0 (including) 7.0.1 (excluding)

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


References to Advisories, Solutions, and Tools