CVE-2026-64392

9.1 Critique

Publiée le 25/07/2026 à 12:17 · Modifiée le 04/09/2026 à 21:08 · Analysée par le NVD · Source : 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for delete-on-close Delete-on-close can be completed by deferred or durable handle teardown, where no request work is available. Both the base-file unlink and the ADS xattr removal consequently run with the ksmbd worker credentials and can bypass filesystem permission checks. Run both operations with the credentials captured in struct file when the handle was opened. This preserves the authenticated user's fsuid, fsgid, supplementary groups and capability restrictions at final close.

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Produits concernés

Linux
Linux linux kernel

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.1 Critique	416baaa9-dc9f-4396-8d5f-8c081fb06d67	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`

Références

https://git.kernel.org/stable/c/18c59109bb6fb816d5102171666f87cf1e29901d Patch
https://git.kernel.org/stable/c/4b7059974549d278e30fe70e2a4e421f9839817d Patch
https://git.kernel.org/stable/c/52e2f21911158ec961cd5aae19c56460db382af0 Patch
https://git.kernel.org/stable/c/e72c15085b6d86f45d224d98aa75b5cace4aaab9 Patch
https://git.kernel.org/stable/c/f08b3f451f12eee4abd8a5981803bc36db84458b Patch

Ailleurs

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