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Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2025-096 (ALASKERNEL-5.15-2025-096)

medium Nessus Plugin ID 281777

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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 5.15.197-138.220. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2025-096 advisory.

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

 netfilter: nf_tables: reject duplicate device on updates (CVE-2025-38678)

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

 mm/ksm: fix flag-dropping behavior in ksm_madvise (CVE-2025-40040)

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

 net/sched: sch_qfq: Fix null-deref in agg_dequeue (CVE-2025-40083)

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

 ACPI: video: Fix use-after-free in acpi_video_switch_brightness() (CVE-2025-40211)

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

 vsock: Ignore signal/timeout on connect() if already established (CVE-2025-40248)

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

 net: openvswitch: remove never-working support for setting nsh fields (CVE-2025-40254)

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

 mptcp: fix a race in mptcp_pm_del_add_timer() (CVE-2025-40257)

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

 mptcp: fix race condition in mptcp_schedule_work() (CVE-2025-40258)

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

 scsi: sg: Do not sleep in atomic context (CVE-2025-40259)

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

 be2net: pass wrb_params in case of OS2BMC (CVE-2025-40264)

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

 fs/proc: fix uaf in proc_readdir_de() (CVE-2025-40271)

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

 mm/secretmem: fix use-after-free race in fault handler (CVE-2025-40272)

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

 NFSD: free copynotify stateid in nfs4_free_ol_stateid() (CVE-2025-40273)

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

 net: sched: act_connmark: initialize struct tc_ife to fix kernel leak (CVE-2025-40279)

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

 sctp: prevent possible shift-out-of-bounds in sctp_transport_update_rto (CVE-2025-40281)

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

 fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds (CVE-2025-40304)

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

 ntfs3: pretend $Extend records as regular files (CVE-2025-40313)

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

 bpf: Sync pending IRQ work before freeing ring buffer (CVE-2025-40319)

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

 fbdev: bitblit: bound-check glyph index in bit_putcs* (CVE-2025-40322)

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

 NFSD: Fix crash in nfsd4_read_release() (CVE-2025-40324)

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

 sctp: Prevent TOCTOU out-of-bounds write (CVE-2025-40331)

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-5.15-2025-096' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2KERNEL-5.15-2025-096.html

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

https://explore.alas.aws.amazon.com/CVE-2025-38678.html

https://explore.alas.aws.amazon.com/CVE-2025-40040.html

https://explore.alas.aws.amazon.com/CVE-2025-40083.html

https://explore.alas.aws.amazon.com/CVE-2025-40211.html

https://explore.alas.aws.amazon.com/CVE-2025-40248.html

https://explore.alas.aws.amazon.com/CVE-2025-40254.html

https://explore.alas.aws.amazon.com/CVE-2025-40257.html

https://explore.alas.aws.amazon.com/CVE-2025-40258.html

https://explore.alas.aws.amazon.com/CVE-2025-40259.html

https://explore.alas.aws.amazon.com/CVE-2025-40264.html

https://explore.alas.aws.amazon.com/CVE-2025-40271.html

https://explore.alas.aws.amazon.com/CVE-2025-40272.html

https://explore.alas.aws.amazon.com/CVE-2025-40273.html

https://explore.alas.aws.amazon.com/CVE-2025-40279.html

https://explore.alas.aws.amazon.com/CVE-2025-40281.html

https://explore.alas.aws.amazon.com/CVE-2025-40304.html

https://explore.alas.aws.amazon.com/CVE-2025-40313.html

https://explore.alas.aws.amazon.com/CVE-2025-40319.html

https://explore.alas.aws.amazon.com/CVE-2025-40322.html

https://explore.alas.aws.amazon.com/CVE-2025-40324.html

https://explore.alas.aws.amazon.com/CVE-2025-40331.html

Plugin Details

Severity: Medium

ID: 281777

File Name: al2_ALASKERNEL-5_15-2025-096.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/5/2026

Updated: 1/5/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

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

CVSS Score Source: CVE-2025-38678

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-tools-devel, 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-livepatch-5.15.197-138.220, 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: 1/5/2026

Vulnerability Publication Date: 9/3/2025

Reference Information

CVE: CVE-2025-38678, CVE-2025-40040, CVE-2025-40083, CVE-2025-40211, CVE-2025-40248, CVE-2025-40254, CVE-2025-40257, CVE-2025-40258, CVE-2025-40259, CVE-2025-40264, CVE-2025-40271, CVE-2025-40272, CVE-2025-40273, CVE-2025-40279, CVE-2025-40281, CVE-2025-40304, CVE-2025-40313, CVE-2025-40319, CVE-2025-40322, CVE-2025-40324, CVE-2025-40331