CVE-2026-64392

Last refreshed2026-10-30

Status: UPDATED | Advisory ID: CVE-2026-64392

Key Details

CVE	CVE-2026-64392
CVSS Score / Version	9.1 (Critical) / CVSS v3.1
Updated	2026-10-30
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-64392
CVE	https://www.cve.org/CVERecord?id=CVE-2026-64392

Source

Reference

NVD

CVE