Security Advisory
CVE-2026-64138
8.8
HIGH
Vulnerability 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.
Published Date
July 19, 2026
Official Source
NIST NVD Advisory