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Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-128 (ALASKERNEL-5.10-2026-128)

critical Nessus Plugin ID 332011

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 5.10.260-259.1061. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2026-128 advisory.

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

 ipv6: use RCU in ip6_output() (CVE-2025-40158)

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

 xfrm: Wait for RCU readers during policy netns exit (CVE-2026-43091)

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

 sched/psi: fix race between file release and pressure write (CVE-2026-52991)

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

 sctp: validate embedded INIT chunk and address list lengths in cookie (CVE-2026-53224)

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-5.10-2026-128' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2KERNEL-5.10-2026-128.html

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

https://explore.alas.aws.amazon.com/CVE-2025-40158.html

https://explore.alas.aws.amazon.com/CVE-2026-43091.html

https://explore.alas.aws.amazon.com/CVE-2026-52991.html

https://explore.alas.aws.amazon.com/CVE-2026-53224.html

Plugin Details

Severity: Critical

ID: 332011

File Name: al2_ALASKERNEL-5_10-2026-128.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/4/2026

Updated: 8/4/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.92

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-53224

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

Temporal Vector: CVSS:3.0/E:U/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-livepatch-5.10.260-259.1061, 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 Ease: No known exploits are available

Patch Publication Date: 8/4/2026

Vulnerability Publication Date: 11/12/2025

Reference Information

CVE: CVE-2025-40158, CVE-2026-43091, CVE-2026-52991, CVE-2026-53224