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Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-120 (ALASKERNEL-5.10-2026-120)

high Nessus Plugin ID 317030

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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 5.10.255-253.1008. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2026-120 advisory.

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

 Buffer overflow in drivers/xen/sys-hypervisor.c (CVE-2026-31786)

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

 xen/privcmd: fix double free via VMA splitting (CVE-2026-31787)

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

 net/rds: reset op_nents when zerocopy page pin fails (CVE-2026-43494)

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

 ptrace: slightly saner 'get_dumpable()' logic (CVE-2026-46333)

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-5.10-2026-120' to update your system.

See Also

https://explore.alas.aws.amazon.com/CVE-2026-31787.html

https://explore.alas.aws.amazon.com/CVE-2026-43494.html

https://explore.alas.aws.amazon.com/CVE-2026-46333.html

https://alas.aws.amazon.com//AL2/ALAS2KERNEL-5.10-2026-120.html

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

https://explore.alas.aws.amazon.com/CVE-2026-31786.html

Plugin Details

Severity: High

ID: 317030

File Name: al2_ALASKERNEL-5_10-2026-120.nasl

Version: 1.3

Type: Local

Agent: unix

Published: 5/27/2026

Updated: 6/17/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-31787

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:bpftool, p-cpe:/a:amazon:linux:perf-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-livepatch-5.10.255-253.1008, 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:bpftool-debuginfo, 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: 5/26/2026

Vulnerability Publication Date: 5/15/2026

Reference Information

CVE: CVE-2026-31786, CVE-2026-31787, CVE-2026-43494, CVE-2026-46333