KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish (Linux Linux)

CVE-2026-31591
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.12 % · centile 2 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

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).

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected ad27ce155566f2b4400fa865859834592bd18777 < 30fd9d8c82087742168db779929d8be0459b0716 ; affected ad27ce155566f2b4400fa865859834592bd18777 < 4df77742e8b9a6b935bdf46f02fd0aca4d4ee7f5 ; affected ad27ce155566f2b4400fa865859834592bd18777 < c87938fc7d99a06a7e5477c45b4e5a4148f85d66 ; affected ad27ce155566f2b4400fa865859834592bd18777 < cb923ee6a80f4e604e6242a4702b59251e61a380
Linux · Linuxaffected 6.11 ; unaffected 0 < 6.11 ; unaffected 6.18.24 ≤ 6.18.* ; unaffected 6.19.14 ≤ 6.19.* ; unaffected 7.0.1 ≤ 7.0.* ; unaffected 7.1 ≤ *

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD