CVE-2026-64138

HighCVSS 8.8/10Last modified Oct 21, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

No affected versions have been published.

Timeline

Published
Jul 19, 2026
Last modified
Oct 21, 2026
NVD status
Modified

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CVE-2026-64138: High severity, CVSS 8.8 | Vulnix