KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU (Linux Linux)

CVE-2026-64286
HIGH 8.2

En bref

Source
NVD
EPSS
EPSS 0.18 % · centile 7 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vCPU context into the hyp's private vCPU on every run. ctxt_to_vcpu() expects a guest context to have a NULL __hyp_running_vcpu, which is only ever set on the host context, so that it resolves the vCPU via container_of(). While this is generally the case, flush_hyp_vcpu() copies the context verbatim and does not enforce this, so a value provided by the host is dereferenced at EL2 (host -> EL2). Fix by clearing __hyp_running_vcpu after the copy.

Faiblesses (CWE)

  • CWE-822 — Untrusted Pointer Dereference

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.2CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.2CVSS:3.1/AV:L/AC:L/PR:H/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 be66e67f175096f283c9d5614c4991fc9e7ed975 < 477145860dba4c30f0b4e36f02f4c5291c1c888b ; affected be66e67f175096f283c9d5614c4991fc9e7ed975 < dfaef40d8a1533940fc1af788d70fce07362b4ce ; affected be66e67f175096f283c9d5614c4991fc9e7ed975 < 6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa ; affected be66e67f175096f283c9d5614c4991fc9e7ed975 < d4f4d61715d1061ba83b88196a3605662be30750 ; affected be66e67f175096f283c9d5614c4991fc9e7ed975 < e8042f6e1d7befb2fb6b10a75918642bcd0acf9a
Linux · Linuxaffected 6.2 ; unaffected 0 < 6.2 ; unaffected 6.6.145 ≤ 6.6.* ; unaffected 6.12.97 ≤ 6.12.* ; unaffected 6.18.39 ≤ 6.18.* ; unaffected 7.1.4 ≤ 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