CVE-2026-64391
CRITICAL
9.8
CVSS Severity Score
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for ADS I/O Alternate data streams are stored as xattrs. Unlike regular file I/O, their read and write paths therefore call VFS xattr helpers which recheck inode permissions and LSM policy using the current task credentials. Run ADS I/O with the credentials captured when the SMB handle was opened.
Affected Platforms (CPE)
No CPE configurations currently published for this record.