VULNERABILITY INTELLIGENCE
CVE-2026-64391
CVSS score9.8 CRITICAL
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-07-25
Last modified2026-10-30
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- nvd@nist.gov: NVD-CWE-noinfo