CVE-2026-31591

MEDIUM EPSS 2.3%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.11  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel*≥7.0  –  <7.0.1

References 4

  • git.kernel.org https://git.kernel.org/stable/c/30fd9d8c82087742168db779929d8be0459b0716
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c87938fc7d99a06a7e5477c45b4e5a4148f85d66
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cb923ee6a80f4e604e6242a4702b59251e61a380
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/30fd9d8c82087742168db779929d8be0459b0716
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c87938fc7d99a06a7e5477c45b4e5a4148f85d66
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cb923ee6a80f4e604e6242a4702b59251e61a380
    Patch