Amazon Linux 2023 : perl-CryptX, perl-CryptX-tests (ALAS2023-2026-1834)

high Nessus Plugin ID 322012

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1834 advisory.

CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.

The gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.

Any caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow. (CVE-2026-41565)

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-CryptX --releasever 2023.12.20260622' or or 'dnf update --advisory ALAS2023-2026-1834 --releasever 2023.12.20260622' to update your system.

Plugin Details

Severity: High

ID: 322012

File Name: al2023_ALAS2023-2026-1834.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/22/2026

Updated: 6/22/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2026-41565

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

CPE: p-cpe:/a:amazon:linux:perl-cryptx-tests, p-cpe:/a:amazon:linux:perl-cryptx, p-cpe:/a:amazon:linux:perl-cryptx-debuginfo, p-cpe:/a:amazon:linux:perl-cryptx-debugsource, cpe:/o:amazon:linux:2023

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: 5/28/2026

Reference Information

CVE: CVE-2026-41565

Detections

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