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CVE-2026-64138

Last refreshed2026-10-23

Status: UPDATED  |  Advisory ID: CVE-2026-64138

Key Details

CVECVE-2026-64138
CVSS Score / Version
8.8 (High) / CVSS v3.1
Updated2026-10-21
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Linux Kernel

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: validate SID in parent security descriptor during ACL inheritance

Introduce smb_validate_ntsd_sid() helper to safely validate Owner SID

and Group SID inside the NT Security Descriptor (smb_ntsd) retrieved

from the parent directory.

What to Do

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

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-64138
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-64138

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