CVE-2026-64391

9.8 Critique

Publiée le 25/07/2026 à 12:17 · Modifiée le 21/10/2026 à 15:19 · Modifiée · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for ADS I/O Alternate data streams are stored as xattrs. Unlike regular file I/O, their read and write paths therefore call VFS xattr helpers which recheck inode permissions and LSM policy using the current task credentials. Run ADS I/O with the credentials captured when the SMB handle was opened.

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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.8 Critique	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Références

https://git.kernel.org/stable/c/2ad5509dd576ae16d252d4698daf03002f9e0234
https://git.kernel.org/stable/c/2b4592cea214683de0f2ce6f8c22c097fb0ea1ab Patch
https://git.kernel.org/stable/c/52a56cf53ec834c44ac1b4d16d585f26613ee5ce Patch
https://git.kernel.org/stable/c/a8f5d39971bbad9340d49cd41b0e2da9452a649d Patch
https://git.kernel.org/stable/c/baa5e094886fffa7e6272edcb5e08be5ce28262c Patch

Ailleurs

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