Detections
Analytics

Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2025-094 (ALASKERNEL-5.15-2025-094)

high Nessus Plugin ID 277768

Language:

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 5.15.196-137.219. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2025-094 advisory.

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

 vfs: Don't leak disconnected dentries on umount (CVE-2025-40105)

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

 ext4: detect invalid INLINE_DATA + EXTENTS flag combination (CVE-2025-40167)

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

 net/ip6_tunnel: Prevent perpetual tunnel growth (CVE-2025-40173)

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

 fuse: fix livelock in synchronous file put from fuseblk workers (CVE-2025-40220)

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

 vsock: fix lock inversion in vsock_assign_transport() (CVE-2025-40231)

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

 sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)

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

 arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() (CVE-2025-40346)

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-5.15-2025-094' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2KERNEL-5.15-2025-094.html

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

https://explore.alas.aws.amazon.com/CVE-2025-40105.html

https://explore.alas.aws.amazon.com/CVE-2025-40167.html

https://explore.alas.aws.amazon.com/CVE-2025-40173.html

https://explore.alas.aws.amazon.com/CVE-2025-40220.html

https://explore.alas.aws.amazon.com/CVE-2025-40231.html

https://explore.alas.aws.amazon.com/CVE-2025-40240.html

https://explore.alas.aws.amazon.com/CVE-2025-40346.html

Plugin Details

Severity: High

ID: 277768

File Name: al2_ALASKERNEL-5_15-2025-094.nasl

Version: 1.2

Type: local

Agent: unix

Published: 12/8/2025

Updated: 2/9/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2025-40240

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

Temporal Vector: CVSS:3.0/E:U/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-livepatch-5.15.196-137.219, 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: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 Ease: No known exploits are available

Patch Publication Date: 12/8/2025

Vulnerability Publication Date: 10/30/2025

Reference Information

CVE: CVE-2025-40105, CVE-2025-40167, CVE-2025-40173, CVE-2025-40220, CVE-2025-40231, CVE-2025-40240, CVE-2025-40346