Security Advisory

CVE-2026-64391

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-25 08:50:38

Last updated 2026-07-25 08:50:38

Assigner Linux

CVSS score not scored

State PUBLISHED

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.

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