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AlmaLinux 9.2 [TuxCare] Security Update: perl-Archive-Tar (ALMALINUX9.2:CLSA-2026:1786095908)

high Nessus Plugin ID 362242

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-2026:1786095908 advisory.

 - Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header. _read_tar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value.
 A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.
 (CVE-2026-9538)

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 perl-Archive-Tar package based on the guidance in TuxCare advisory ALMALINUX9.2:CLSA-2026:1786095908.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1786095908

http://www.nessus.org/u?da5d07cb

Plugin Details

Severity: High

ID: 362242

File Name: tuxcare_alma_linux_9.2_CLSA-2026-1786095908.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: Low

Score: 3

Percentile: 23.67

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:N/A:C

CVSS Score Source: CVE-2026-9538

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:N/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: 8/7/2026

Vulnerability Publication Date: 5/26/2026

Reference Information

CVE: CVE-2026-9538

CLSA: 2026:1786095908