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AlmaLinux 9.2 [TuxCare] Security Update: tar (ALMALINUX9.2:CLSA-2026:1789128477)

medium Nessus Plugin ID 361745

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Synopsis

The AlmaLinux host is missing one or more security updates.

Description

The AlmaLinux 9.2 host has a package installed that is affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1789128477 advisory.

 - A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined with a preexisting symbolic link under the working directory, may allow writing outside that boundary during a single extraction. (CVE-2026-18508)

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 tar package based on the guidance in TuxCare advisory ALMALINUX9.2:CLSA-2026:1789128477.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1789128477

http://www.nessus.org/u?a6f365a1

Plugin Details

Severity: Medium

ID: 361745

File Name: tuxcare_alma_linux_9.2_CLSA-2026-1789128477.nasl

Version: 1.1

Type: Local

Published: 10/1/2026

Updated: 10/1/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.96

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

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

CVSS Score Source: CVE-2026-18508

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

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

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

Vulnerability Information

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/11/2026

Vulnerability Publication Date: 8/3/2026

Reference Information

CVE: CVE-2026-18508

CLSA: 2026:1789128477