Amazon Linux 2 : openssl11, --advisory ALAS2-2026-3249 (ALAS-2026-3249)

high Nessus Plugin ID 306295

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of openssl11 installed on the remote host is prior to 1.1.1zg-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3249 advisory.

Potential use-after-free in DANE client code (CVE-2026-28387)

NULL Pointer Dereference When Processing a Delta CRL

NOTE: https://openssl-library.org/news/secadv/20260407.txt (CVE-2026-28388)

Possible NULL dereference when processing CMS KeyAgreeRecipientInfo (CVE-2026-28389)

Possible NULL dereference when processing CMS KeyTransportRecipientInfo (CVE-2026-28390)

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

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

Solution

Run 'yum update openssl11' or or 'yum update --advisory ALAS2-2026-3249' to update your system.

Plugin Details

Severity: High

ID: 306295

File Name: al2_ALAS-2026-3249.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 4/14/2026

Updated: 5/5/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-28387

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:openssl11, p-cpe:/a:amazon:linux:openssl11-debuginfo, p-cpe:/a:amazon:linux:openssl11-devel, p-cpe:/a:amazon:linux:openssl11-static, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:openssl11-libs

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/14/2026

Vulnerability Publication Date: 4/7/2026

Reference Information

CVE: CVE-2026-28387, CVE-2026-28388, CVE-2026-28389, CVE-2026-28390

IAVA: 2026-A-0308

Detections

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