CVE-2026-1933— Samba: missing access check on reparse point operations
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在访问控制错误漏洞，该漏洞源于处理NTFS风格重解析点时缺少SMB层访问检查，可能导致经过身份验证的用户在只读导出上创建或删除重解析点元数据，包括将文件转换为符号链接或其他重解析点类型。
Possible ATT&CK Techniques 2 AI
T1564 · Hide Artifacts T1068 · Exploitation for Privilege EscalationAffected Version Matrix 28
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I. Basic Information for CVE-2026-1933
Vulnerability Information
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Vulnerability Title
Samba: missing access check on reparse point operations
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Samba 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在访问控制错误漏洞，该漏洞源于处理NTFS风格重解析点时缺少SMB层访问检查，可能导致经过身份验证的用户在只读导出上创建或删除重解析点元数据，包括将文件转换为符号链接或其他重解析点类型。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:4.23.5-109.el10_2 ~ * |
cpe:/o:redhat:enterprise_linux:10.2
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| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:4.21.3-114.el10_0.1 ~ * |
cpe:/o:redhat:enterprise_linux_eus:10.0
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:4.19.4-16.el8_10 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:4.19.4-16.el8_10 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:4.15.5-16.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:4.15.5-16.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:4.17.5-7.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:4.17.5-7.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:4.23.5-10.el9_8 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:4.23.5-10.el9_8 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:4.17.5-105.el9_2.5 ~ * |
cpe:/a:redhat:rhel_e4s:9.2::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:4.19.4-105.el9_4.4 ~ * |
cpe:/a:redhat:rhel_e4s:9.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:4.21.3-14.el9_6.1 ~ * |
cpe:/a:redhat:rhel_eus:9.6::appstream
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.12 | 412.86.202608241157-0 ~ * |
cpe:/a:redhat:openshift:4.12::el8
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.13 | 413.92.202609080414-0 ~ * |
cpe:/a:redhat:openshift:4.13::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.14 | 414.92.202608172040-0 ~ * |
cpe:/a:redhat:openshift:4.14::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.15 | 415.92.202608180329-0 ~ * |
cpe:/a:redhat:openshift:4.15::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.16 | 416.94.202608150307-0 ~ * |
cpe:/a:redhat:openshift:4.16::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.17 | 417.94.202608250221-0 ~ * |
cpe:/a:redhat:openshift:4.17::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.18 | 418.94.202608142238-0 ~ * |
cpe:/a:redhat:openshift:4.18::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 | 4.19.9.6.202606241344-0 ~ * |
cpe:/a:redhat:openshift:4.19::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.20 | 4.20.9.6.202608121719-0 ~ * |
cpe:/a:redhat:openshift:4.20::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.21 | 4.21.9.6.202608122143-0 ~ * |
cpe:/a:redhat:openshift:4.21::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.22 | 4.22.9.8.202608130832-0 ~ * |
cpe:/a:redhat:openshift:4.22::el9
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
II. Public POCs for CVE-2026-1933
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-1933 (1)
Vendor Advisories for CVE-2026-1933 (15)
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🔗 2447317 – (CVE-2026-1933) CVE-2026-1933 samba: Missing access check on reparse point operations Read full article issue-tracking x_refsource_REDHAT
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🔗 RHSA-2026:22963 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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Other References for CVE-2026-1933 (6)
Same Patch Batch · Red Hat · 2026-05-27 · 5 CVEs total
| CVE-2026-3012 | 8.0 HIGH | Samba: group policy certificate enrollment uses http:// without validation |
| CVE-2026-9704 | 6.8 MEDIUM | Keycloak: keycloak: privilege escalation due to oversized subject_token jwt |
| CVE-2026-2340 | 6.5 MEDIUM | Samba: vfs_worm does not block directory modification |
| CVE-2026-9689 | 4.2 MEDIUM | Keycloak: org.keycloak.protocol.oidc: http parameter pollution in oidc redirect uri allows |
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V. Comments for CVE-2026-1933
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