KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (Linux Linux)

CVE-2026-43133
HIGH 7.9

En bref

Source
NVD
EPSS
EPSS 0.13 % · centile 3 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80ae69f ("KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state") made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code to always use vmcb01. As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01 instead of the current VMCB.

Faiblesses (CWE)

  • CWE-628 — Function Call with Incorrectly Specified Arguments
  • CWE-754 — Vérification incorrecte de conditions inhabituelles ou exceptionnelles

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.9CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:HLinux
CVSS 3.1HIGH 7.9CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Hredhat-SADP
CVSS 3.1HIGH 7.9CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.9CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:HNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected cc3ed80ae69f454c3d904af9f65394a540099723 < 10063e1251c1485034a018236080792ad083dcc5 ; affected cc3ed80ae69f454c3d904af9f65394a540099723 < c3b7015000988ba35ecd5648f4b2283960f00543 ; affected cc3ed80ae69f454c3d904af9f65394a540099723 < 3880e331b0b31d0d5d3702b124f6c93539cd478a ; affected cc3ed80ae69f454c3d904af9f65394a540099723 < fce2fd4a2ca05670a91015aacccf96a1c26268fd ; affected cc3ed80ae69f454c3d904af9f65394a540099723 < d464cf1ed900d47c85393d40b00017b6adfc2e6c ; affected cc3ed80ae69f454c3d904af9f65394a540099723 < 0004ecb798b30e90d7ebfe74efae2d9423315a64
Linux · Linuxaffected 5.13 ; unaffected 0 < 5.13 ; unaffected 5.15.202 ≤ 5.15.* ; unaffected 6.1.165 ≤ 6.1.* ; unaffected 6.6.128 ≤ 6.6.* ; unaffected 6.12.75 ≤ 6.12.*

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