Detections
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Amazon Linux 2 : kernel (ALASKERNEL-5.4-2025-100)
high Nessus Plugin ID 234966
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 5.4.292-208.414. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2025-100 advisory.In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Fix use-after-free of encap entry in neigh update handler (CVE-2021-47247)
In the Linux kernel, the following vulnerability has been resolved:
scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress (CVE-2023-52975)
In the Linux kernel, the following vulnerability has been resolved:
mm: call the security_mmap_file() LSM hook in remap_file_pages() (CVE-2024-47745)
In the Linux kernel, the following vulnerability has been resolved:
net: do not delay dst_entries_add() in dst_release() (CVE-2024-50036)
In the Linux kernel, the following vulnerability has been resolved:
padata: avoid UAF for reorder_work (CVE-2025-21726)
In the Linux kernel, the following vulnerability has been resolved:
ipv6: mcast: extend RCU protection in igmp6_send() (CVE-2025-21759)
In the Linux kernel, the following vulnerability has been resolved:
nfsd: clear acl_access/acl_default after releasing them (CVE-2025-21796)
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' to update your system.See Also
https://alas.aws.amazon.com/AL2/ALASKERNEL-5.4-2025-100.html
https://alas.aws.amazon.com/cve/html/CVE-2021-47247.html
https://alas.aws.amazon.com/cve/html/CVE-2023-52975.html
https://alas.aws.amazon.com/cve/html/CVE-2024-47745.html
https://alas.aws.amazon.com/cve/html/CVE-2024-50036.html
https://alas.aws.amazon.com/cve/html/CVE-2025-21726.html
https://alas.aws.amazon.com/cve/html/CVE-2025-21759.html
Plugin Details
Severity: High
ID: 234966
File Name: al2_ALASKERNEL-5_4-2025-100.nasl
Version: 1.1
Type: local
Agent: unix
Published: 4/29/2025
Updated: 4/29/2025
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: 6.8
Temporal Score: 5
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2024-47745
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.8
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: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, 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: 4/23/2025
Vulnerability Publication Date: 5/21/2024
Reference Information
CVE: CVE-2021-47247, CVE-2023-52975, CVE-2024-47745, CVE-2024-50036, CVE-2025-21726, CVE-2025-21759, CVE-2025-21796