Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2025-090 (ALASKERNEL-5.15-2025-090)

medium Nessus Plugin ID 266163

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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 5.15.75-48.135. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2025-090 advisory.

A vulnerability, which was classified as problematic, has been found in Linux Kernel. This issue affects the function nilfs_attach_log_writer of the file fs/nilfs2/segment.c of the component BPF. The manipulation leads to memory leak. The attack may be initiated remotely. It is recommended to apply a patch to fix this issue. The identifier VDB-211961 was assigned to this vulnerability. (CVE-2022-3646)

drivers/scsi/stex.c in the Linux kernel through 5.19.9 allows local users to obtain sensitive information from kernel memory because stex_queuecommand_lck lacks a memset for the PASSTHRU_CMD case.
(CVE-2022-40768)

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (CVE-2022-43945)

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

NFSD: Protect against send buffer overflow in NFSv2 READDIR (CVE-2022-50235)

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

NFSD: fix use-after-free on source server when doing inter-server copy (CVE-2022-50241)

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

sctp: handle the error returned from sctp_auth_asoc_init_active_key (CVE-2022-50243)

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

xen/gntdev: Prevent leaking grants (CVE-2022-50257)

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

vhost/vsock: Use kvmalloc/kvfree for larger packets. (CVE-2022-50271)

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

md: Replace snprintf with scnprintf (CVE-2022-50299)

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

nbd: Fix hung when signal interrupts nbd_start_device_ioctl() (CVE-2022-50314)

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

jbd2: fix potential use-after-free in jbd2_fc_wait_bufs (CVE-2022-50328)

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

ext4: fix null-ptr-deref in ext4_write_info (CVE-2022-50344)

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

NFSD: Protect against send buffer overflow in NFSv3 READ (CVE-2022-50345)

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

nfsd: Fix a memory leak in an error handling path (CVE-2022-50348)

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

btrfs: fix race between quota enable and quota rescan ioctl (CVE-2022-50379)

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

net/ieee802154: reject zero-sized raw_sendmsg() (CVE-2022-50397)

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

net: If sock is dead don't access sock's sk_wq in sk_stream_wait_memory (CVE-2022-50409)

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

NFSD: Protect against send buffer overflow in NFSv2 READ (CVE-2022-50410)

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

scsi: libsas: Fix use-after-free bug in smp_execute_task_sg() (CVE-2022-50422)

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

ext4: avoid crash when inline data creation follows DIO write (CVE-2022-50435)

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

xfrm: Reinject transport-mode packets through workqueue (CVE-2022-50445)

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

xen/gntdev: Accommodate VMA splitting (CVE-2022-50471)

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

drm/mipi-dsi: Detach devices when removing the host (CVE-2022-50489)

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

bpf: Propagate error from htab_lock_bucket() to userspace (CVE-2022-50490)

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

ext4: fix potential memory leak in ext4_fc_record_regions() (CVE-2022-50512)

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

usb: host: xhci: Fix potential memory leak in xhci_alloc_stream_info() (CVE-2022-50544)

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-5.15-2025-090' to update your system.

Plugin Details

Severity: Medium

ID: 266163

File Name: al2_ALASKERNEL-5_15-2025-090.nasl

Version: 1.4

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 9/30/2025

Updated: 10/24/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2022-40768

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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-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, p-cpe:/a:amazon:linux:kernel-livepatch-5.15.75-48.135, 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: 9/29/2025

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2022-3646, CVE-2022-40768, CVE-2022-43945, CVE-2022-50235, CVE-2022-50241, CVE-2022-50243, CVE-2022-50257, CVE-2022-50271, CVE-2022-50299, CVE-2022-50314, CVE-2022-50328, CVE-2022-50344, CVE-2022-50348, CVE-2022-50379, CVE-2022-50409, CVE-2022-50410, CVE-2022-50422, CVE-2022-50435, CVE-2022-50445, CVE-2022-50471, CVE-2022-50489, CVE-2022-50490, CVE-2022-50512, CVE-2022-50544

Detections

Analytics

Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2025-090 (ALASKERNEL-5.15-2025-090)

medium Nessus Plugin ID 266163

Synopsis

Description

Solution

See Also

Plugin Details

Risk Information

VPR

CVSS v2

CVSS v3

Vulnerability Information

Reference Information