CVE-2026-64395

7.5 Élevée

Publiée le 25/07/2026 à 12:17 · Modifiée le 04/09/2026 à 16:47 · Analysée par le NVD · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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.

Traduire en français

Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.5 Élevée	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

Références

https://git.kernel.org/stable/c/2d2ab6983620c2d60ce7db72133984ca3873b929 Patch
https://git.kernel.org/stable/c/67bdad9cf01b25030e3bf00bbce6c309319d6663 Patch
https://git.kernel.org/stable/c/a10942af27832c2761d020863a46e79bebe0567d Patch
https://git.kernel.org/stable/c/b0d4d5cb846a1ddb7aaab9adfb5986e4540e6e5f Patch
https://git.kernel.org/stable/c/cedff600f1642aa982178503552f0d007bc829c8 Patch
https://git.kernel.org/stable/c/db231af842868268839f9f9619c68cb27830d8be Patch

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories