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Amazon Linux 2023 : perl-Unicode-LineBreak (ALAS2023-2026-1831)

medium Nessus Plugin ID 322078

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1831 advisory.

 Text::LineFold versions through 2019.001 for Perl duplicate the output based on the number of special break characters.

 Text::LineFold splits the input string by specific line break characters (such as VT, FF and others) into segments, but applies the break function to the entire string, not just the segment.

 A side effect of this is that the full input can be duplicated for each segment. Besides being incorrect, this can lead to unexpected resource consumption and possible denial of service.

 Note that Text::LineFold is part of the Unicode-LineBreak distribution, which may have a higher version number than the module. (CVE-2026-8594)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'dnf update perl-Unicode-LineBreak --releasever 2023.12.20260622' or or 'dnf update --advisory ALAS2023-2026-1831 --releasever 2023.12.20260622' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1831.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-8594.html

Plugin Details

Severity: Medium

ID: 322078

File Name: al2023_ALAS2023-2026-1831.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/22/2026

Updated: 6/22/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS Score Source: CVE-2026-8594

CVSS v3

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 5.4

Vector: CVSS:3.0/AV:L/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

CPE: p-cpe:/a:amazon:linux:perl-unicode-linebreak-debuginfo, p-cpe:/a:amazon:linux:perl-unicode-linebreak-debugsource, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:perl-unicode-linebreak

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2026

Vulnerability Publication Date: 5/30/2026

Reference Information

CVE: CVE-2026-8594