CVE-2026-1933

Samba: missing access check on reparse point operations

State: Published
Severity: 7.1 High
Published: May 27, 2026
Updated: Oct 30, 2026
Reserved: Feb 4, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H	redhat
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H	redhat-SADP

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:4.23.5-109.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:4.21.3-114.el10_0.1 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:4.19.4-16.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:4.19.4-16.el8_10 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:4.15.5-16.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:4.15.5-16.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:4.17.5-7.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:4.17.5-7.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:4.23.5-10.el9_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:4.23.5-10.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:4.17.5-105.el9_2.5 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:4.19.4-105.el9_4.4 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:4.21.3-14.el9_6.1 and laterNot affected
Red Hat OpenShift Container Platform 4.12Red Hat	412.86.202608241157-0 and laterNot affected
Red Hat OpenShift Container Platform 4.13Red Hat	413.92.202609080414-0 and laterNot affected
Red Hat OpenShift Container Platform 4.14Red Hat	414.92.202608172040-0 and laterNot affected
Red Hat OpenShift Container Platform 4.15Red Hat	415.92.202608180329-0 and laterNot affected
Red Hat OpenShift Container Platform 4.16Red Hat	416.94.202608150307-0 and laterNot affected
Red Hat OpenShift Container Platform 4.17Red Hat	417.94.202608250221-0 and laterNot affected
Red Hat OpenShift Container Platform 4.18Red Hat	418.94.202608142238-0 and laterNot affected
Red Hat OpenShift Container Platform 4.19Red Hat	4.19.9.6.202606241344-0 and laterNot affected
Red Hat OpenShift Container Platform 4.20Red Hat	4.20.9.6.202608121719-0 and laterNot affected
Red Hat OpenShift Container Platform 4.21Red Hat	4.21.9.6.202608122143-0 and laterNot affected
Red Hat OpenShift Container Platform 4.22Red Hat	4.22.9.8.202608130832-0 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat OpenShift Container Platform 5Red Hat

References

RHSA-2026:22644vendor-advisory
RHSA-2026:22963vendor-advisory
RHSA-2026:25049vendor-advisory
RHSA-2026:25979vendor-advisory
RHSA-2026:28053vendor-advisory
RHSA-2026:28054vendor-advisory
RHSA-2026:28055vendor-advisory
RHSA-2026:28056vendor-advisory
RHSA-2026:28057vendor-advisory
RHSA-2026:29863vendor-advisory
RHSA-2026:54581vendor-advisory
RHSA-2026:54599vendor-advisory
RHSA-2026:54769vendor-advisory
RHSA-2026:56786vendor-advisory
RHSA-2026:56853vendor-advisory
RHSA-2026:56911vendor-advisory
RHSA-2026:57483vendor-advisory
RHSA-2026:59831vendor-advisory
RHSA-2026:60019vendor-advisory
RHSA-2026:65839vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-1933vdb-entry
RHBZ#2447317issue-tracking
https://bugzilla.samba.org/show_bug.cgi?id=15992
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1933.json

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