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CVE Vulnerabilities

CVE-2026-1933

Improper Access Control

Published: May 27, 2026 | Modified: Jun 23, 2026
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
7.1 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-1933
CWEhttps://cwe.mitre.org/data/definitions/284.html

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.

Weakness

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Affected Software

NameVendorStart VersionEnd Version
Openshift_container_platformRedhat4.0 (including)4.0 (including)
SambaSamba4.1.0 (including)4.2.2 (excluding)
Enterprise_linuxRedhat7.0 (including)7.0 (including)
Enterprise_linuxRedhat8.0 (including)8.0 (including)
Enterprise_linuxRedhat9.0 (including)9.0 (including)
Enterprise_linuxRedhat10.0 (including)10.0 (including)
Red Hat Enterprise Linux 10RedHatsamba-0:4.23.5-109.el10_2*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatsamba-0:4.21.3-114.el10_0.1*
Red Hat Enterprise Linux 8RedHatsamba-0:4.19.4-16.el8_10*
Red Hat Enterprise Linux 8RedHatsamba-0:4.19.4-16.el8_10*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatsamba-0:4.15.5-16.el8_6.1*
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRedHatsamba-0:4.15.5-16.el8_6.1*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatsamba-0:4.17.5-7.el8_8.1*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatsamba-0:4.17.5-7.el8_8.1*
Red Hat Enterprise Linux 9RedHatsamba-0:4.23.5-10.el9_8*
Red Hat Enterprise Linux 9RedHatsamba-0:4.23.5-10.el9_8*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatsamba-0:4.17.5-105.el9_2.5*
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRedHatsamba-0:4.19.4-105.el9_4.4*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatsamba-0:4.21.3-14.el9_6.1*
SambaUbuntudevel*
SambaUbuntuquesting*
SambaUbunturesolute*
SambaUbuntuupstream*

Extended Description

Access control involves the use of several protection mechanisms such as:

When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses:

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References

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