Detections
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Amazon Linux 2 : kernel (ALASKERNEL-5.4-2026-131)

critical Nessus Plugin ID 358446

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 5.4.302-229.498. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2026-131 advisory.

 In the Linux kernel, the following vulnerability has been resolved:

 sctp: don't free the ASCONF's own transport in DEL-IP processing (CVE-2026-64564)

 In the Linux kernel, the following vulnerability has been resolved:

 net/sched: serialize qdisc_rtab_list against concurrent get/put (CVE-2026-68138)

 In the Linux kernel, the following vulnerability has been resolved:

 packet: use consistent hard_header_len in non-ring send paths (CVE-2026-74582)

 In the Linux kernel, the following vulnerability has been resolved:

 sctp: clear control chunk transport if it is being removed (CVE-2026-74688)

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 kernel' or or 'yum update --advisory ALAS2KERNEL-5.4-2026-131' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2KERNEL-5.4-2026-131.html

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

https://explore.alas.aws.amazon.com/CVE-2026-64564.html

https://explore.alas.aws.amazon.com/CVE-2026-68138.html

https://explore.alas.aws.amazon.com/CVE-2026-74582.html

https://explore.alas.aws.amazon.com/CVE-2026-74688.html

Plugin Details

Severity: Critical

ID: 358446

File Name: al2_ALASKERNEL-5_4-2026-131.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.36

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-74688

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:bpftool-debuginfo, p-cpe:/a:amazon:linux:bpftool, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:perf-debuginfo, p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:python-perf-debuginfo, 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: 10/1/2026

Vulnerability Publication Date: 8/4/2026

Reference Information

CVE: CVE-2026-64564, CVE-2026-68138, CVE-2026-74582, CVE-2026-74688