--- id: CVE-2026-1933 title: >- A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes summary: >- 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 re… severity: high cvss: 7.1 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H' cwe: - CWE-284 vendor: redhat product: openshift_container_platform affected: - openshift_container_platform = 4.0 - 'samba >= 4.1.0, < 4.2.2' - enterprise_linux = 7.0 - enterprise_linux = 8.0 - enterprise_linux = 9.0 - enterprise_linux = 10.0 patched: - samba 4.2.2 published: '2026-05-27' updated: '2026-09-18' sourceUpdated: '2026-09-18T13:17:25.807' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-1933' references: - url: 'https://access.redhat.com/errata/RHSA-2026:22644' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:22963' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:25049' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:25979' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28053' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28054' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28055' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28056' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:28057' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:29863' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:54581' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:54599' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:54769' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56786' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56853' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:56911' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:57483' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:59831' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:60019' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:65839' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2026-1933' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2447317' label: secalert@redhat.com - url: 'https://bugzilla.samba.org/show_bug.cgi?id=15992' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2026:22644' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:22963' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:25049' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:25979' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28053' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28054' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28055' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28056' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28057' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:29863' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:54581' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:54599' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:54769' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:56786' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:56853' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:56911' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:57483' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:59831' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:60019' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:65839' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-1933' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2447317' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1933.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-1933' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-1933' tags: - nvd - cve.org - csaf - vex - red-hat epss: 0.00862 epssPercentile: 0.5706 ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2026-05-27T14:40:45.546157Z' ingestedAt: '2026-07-03T13:02:27.458Z' --- ## Overview 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. ## Affected - `openshift_container_platform = 4.0` - `samba >= 4.1.0, < 4.2.2` - `enterprise_linux = 7.0` - `enterprise_linux = 8.0` - `enterprise_linux = 9.0` - `enterprise_linux = 10.0` ## Remediation Upgrade past the affected range: - `samba 4.2.2` ## Vendor advisories - **RHSA-2026:59831** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:59831) - **RHSA-2026:65839** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.13 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:65839) - **RHSA-2026:56786** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56786) - **RHSA-2026:56911** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.15 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56911) - **RHSA-2026:56853** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:56853) - **RHSA-2026:60019** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.17 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:60019) - **RHSA-2026:57483** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:57483) - **RHSA-2026:29863** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-07-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:29863) - **RHSA-2026:54581** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.20 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:54581) - **RHSA-2026:54599** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.21 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:54599) - **RHSA-2026:54769** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-08-18 · [advisory](https://access.redhat.com/errata/RHSA-2026:54769) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat OpenShift Container Platform 4 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1933.json)