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Rocky Linux 9.6 [TuxCare] Security Update: ctdb / ldb-tools / libldb / libldb-devel / libnetapi / etc (ALMALINUX9.6:CLSA-2026:1786093517)

high Nessus Plugin ID 351830

Synopsis

The Rocky Linux host is missing one or more security updates.

Description

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1786093517 advisory.

 - A flaw was found in samba's pam_winbind. When mkhomedir is enabled, pam_winbind chowns the target account's home directory without validating the path is not a critical system directory such as /. On affected systems, accounts with / as their home directory (a common default for system accounts) can have this triggered not only by root, but by a non-root user holding a narrow sudo delegation to run commands as that account, causing ownership of / to change and resulting in severe denial of service (SSH, sudo, and package-manager failures). The change does not grant write access to / (which ships with restrictive 0555 permissions on RHEL), so the impact is availability loss rather than further privilege escalation.
 (CVE-2026-15779) DNS signing DoS via TKEY name cache exhaustion NOTE:
 https://www.samba.org/samba/security/CVE-2026-58218-advisory.html (CVE-2026-58218) TSIG packet with name compression can crash DNS (CVE-2026-6949) (CVE-2026-6949)

Note that Nessus has not tested for this issue 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-2026:1786093517.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1786093517

http://www.nessus.org/u?4d66e1e3

Plugin Details

Severity: High

ID: 351830

File Name: tuxcare_rocky_linux_9.6_CLSA-2026-1786093517.nasl

Version: 1.1

Type: Local

Published: 9/30/2026

Updated: 9/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-6949

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/7/2026

Vulnerability Publication Date: 7/28/2026

Reference Information

CVE: CVE-2026-6949

CLSA: 2026:1786093517