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AlmaLinux 9.6 [TuxCare] Security Update: ctdb / ldb-tools / libldb / libldb-devel / libnetapi / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1781350676)

critical Nessus Plugin ID 360841

Synopsis

The AlmaLinux host is missing one or more security updates.

Description

The AlmaLinux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1781350676 advisory.

 - 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. (CVE-2026-1933)

 - A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the check password script feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the check password script is used with %u and the samba-dcerpcd service is started as a system service. (CVE-2026-4408)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1781350676.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1781350676

http://www.nessus.org/u?52ab3e5b

Plugin Details

Severity: Critical

ID: 360841

File Name: tuxcare_alma_linux_9.6_CLSA-2026-1781350676.nasl

Version: 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.35

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-4408

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/OS/extended-third-party

Exploit Ease: No known exploits are available

Patch Publication Date: 6/13/2026

Vulnerability Publication Date: 5/27/2026

Reference Information

CVE: CVE-2026-1933, CVE-2026-4408

CLSA: 2026:1781350676