KVM: SEV: Check PSC request indices against the actual size of the buffer (Linux Linux)

CVE-2026-63938
CRITICAL 9.3

En bref

Source
NVD
EPSS
EPSS 0.20 % · centile 9 ()
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: Check PSC request indices against the actual size of the buffer When processing Page State Change (PSC) requests, validate the PSC buffer against the effective size of the scratch area, which could be less than the maximum size if the guest provided a pointer that isn't exactly at the start of the GHCB shared buffer.

Faiblesses (CWE)

  • CWE-125 — Lecture hors limites

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1CRITICAL 9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 9b54e248d2644be71cb394eb85f31ad99e023a05 < 5198f70c09a5f6e9e5f5a0a2c6b388f24294b176 ; affected 9b54e248d2644be71cb394eb85f31ad99e023a05 < 75c8d1d7291268b479794fba5808971dc2f5eaf3 ; affected 9b54e248d2644be71cb394eb85f31ad99e023a05 < 505a3b94535583e4265360e2621734e355ef263d ; affected 9b54e248d2644be71cb394eb85f31ad99e023a05 < 121d88de56bc5c0ba0ce2f6381af67f948a7e7c1
Linux · Linuxaffected 6.11 ; unaffected 0 < 6.11 ; unaffected 6.12.93 ≤ 6.12.* ; unaffected 6.18.35 ≤ 6.18.* ; unaffected 7.0.12 ≤ 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