iommu/vt-d: Disallow dirty tracking if incoherent page walk (Linux Linux)

CVE-2025-40058
HIGH 8.8

En bref

Source
NVD
EPSS
EPSS 0.16 % · centile 6 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Deferred

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Disallow dirty tracking if incoherent page walk Dirty page tracking relies on the IOMMU atomically updating the dirty bit in the paging-structure entry. For this operation to succeed, the paging- structure memory must be coherent between the IOMMU and the CPU. In another word, if the iommu page walk is incoherent, dirty page tracking doesn't work. The Intel VT-d specification, Section 3.10 "Snoop Behavior" states: "Remapping hardware encountering the need to atomically update A/EA/D bits in a paging-structure entry that is not snooped will result in a non- recoverable fault." To prevent an IOMMU from being incorrectly configured for dirty page tracking when it is operating in an incoherent mode, mark SSADS as supported only when both ecap_slads and ecap_smpwc are supported.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Produits affectés

ProduitVersions
Linux · Linuxaffected f35f22cc760eb2c7034bf53251399685d611e03f < ebe16d245a00626bb87163862a1b07daf5475a3e ; affected f35f22cc760eb2c7034bf53251399685d611e03f < 8d096ce0e87bdc361f0b25d7943543bc53aa0b9e ; affected f35f22cc760eb2c7034bf53251399685d611e03f < 57f55048e564dedd8a4546d018e29d6bbfff0a7e
Linux · Linuxaffected 6.7 ; unaffected 0 < 6.7 ; unaffected 6.12.53 ≤ 6.12.* ; unaffected 6.17.3 ≤ 6.17.* ; unaffected 6.18 ≤ *

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