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Amazon Linux 2 : kernel, --advisory ALAS2-2026-3289 (ALAS-2026-3289)

high Nessus Plugin ID 312154

Synopsis

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

Description

The version of kernel installed on the remote host is prior to 4.14.355-281.727. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3289 advisory.

 In the Linux kernel, the following vulnerability has been resolved:crypto: algif_aead - Revert to operating out-of-place

 To mitigate this issue, we recommend that customers disable loading of the algif_aead module by running the following commands:

 echo install algif_aead /bin/false > /etc/modprobe.d/disable-algif.conf

 rmmod algif_aead 2>/dev/null || true

 This issue requires local authenticated access as a prerequisite; remote unauthenticated activity is not possible. (CVE-2026-31431)

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 'yum update kernel' or or 'yum update --advisory ALAS2-2026-3289' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2026-3289.html

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

https://explore.alas.aws.amazon.com/CVE-2026-31431.html

Plugin Details

Severity: High

ID: 312154

File Name: al2_ALAS-2026-3289.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/5/2026

Updated: 5/5/2026

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2026-31431

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:perf-debuginfo, p-cpe:/a:amazon:linux:kernel-livepatch-4.14.355-281.727, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:python-perf-debuginfo, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-headers, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:python-perf

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/5/2026

Vulnerability Publication Date: 4/22/2026

CISA Known Exploited Vulnerability Due Dates: 5/15/2026

Reference Information

CVE: CVE-2026-31431