A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6297-1 samba security update
Ubuntu USN Ubuntu USN USN-8306-1 Samba vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

Administrators can mitigate this issue by ensuring users who access a read only = yes Samba share do not have filesystem-level write permission to the exported files. A server administrator may also monitor and remove unintended "user.SmbReparse" xattr (extended attributes) and the associated FILE_ATTRIBUTE_REPARSE_POINT "user.DosAttrib" bit metadata if exploitation is suspected.

History

Wed, 27 May 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 27 May 2026 14:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.
Title Samba: missing access check on reparse point operations
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Weaknesses CWE-284
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-27T14:41:01.347Z

Reserved: 2026-02-04T21:04:39.737Z

Link: CVE-2026-1933

cve-icon Vulnrichment

Updated: 2026-05-27T14:40:56.004Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-27T14:16:44.023

Modified: 2026-05-27T14:54:20.160

Link: CVE-2026-1933

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses