ksmbd: require source read access for duplicate extents (Linux Linux)

CVE-2026-64395
HIGH 7.5

En bref

Source
NVD
EPSS
EPSS 0.41 % · centile 35 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: require source read access for duplicate extents FSCTL_DUPLICATE_EXTENTS_TO_FILE passes the source file directly to vfs_clone_file_range() or vfs_copy_file_range() without checking the SMB access mask granted to the source handle. A handle opened with attribute access can consequently be used to copy file contents into an attacker-readable destination. Require FILE_READ_DATA on the source handle before either VFS operation, matching other ksmbd data-copy paths.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NLinux
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected eb817368f50c1cbe1bd07044124aad7db6330e3a < 2d2ab6983620c2d60ce7db72133984ca3873b929 ; affected eb817368f50c1cbe1bd07044124aad7db6330e3a < 67bdad9cf01b25030e3bf00bbce6c309319d6663 ; affected eb817368f50c1cbe1bd07044124aad7db6330e3a < b0d4d5cb846a1ddb7aaab9adfb5986e4540e6e5f ; affected eb817368f50c1cbe1bd07044124aad7db6330e3a < db231af842868268839f9f9619c68cb27830d8be ; affected eb817368f50c1cbe1bd07044124aad7db6330e3a < a10942af27832c2761d020863a46e79bebe0567d ; affected eb817368f50c1cbe1bd07044124aad7db6330e3a < cedff600f1642aa982178503552f0d007bc829c8
Linux · Linuxaffected 5.15 ; unaffected 0 < 5.15 ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.* ; unaffected 6.12.96 ≤ 6.12.* ; unaffected 6.18.39 ≤ 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