CRITICALVulnerability
CVE-2026-64391
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.
Properties
- severity
- CRITICAL
- score
- 9.8
- cve_id
- CVE-2026-64391
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- published_at
- 2026-07-25T10:17:22.453
- last_modified
- 2026-08-11T15:01:50.637
Related Entities (1)
DESCRIBED_BY (1)
→[Source]NVD
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