Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1866)

high Nessus Plugin ID 322020

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1866 advisory.

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

bpf: fix end-of-list detection in cgroup_storage_get_next_key() (CVE-2026-45838)

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

bpf: reject negative CO-RE accessor indices in bpf_core_parse_spec() (CVE-2026-45839)

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

openvswitch: cap upcall PID array size and pre-size vport replies (CVE-2026-45840)

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

netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO (CVE-2026-45841)

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

slip: reject VJ receive packets on instances with no rstate array (CVE-2026-45842)

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

slip: bound decode() reads against the compressed packet length (CVE-2026-45843)

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

netfilter: arp_tables: fix IEEE1394 ARP payload parsing (CVE-2026-45844)

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

bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst() (CVE-2026-45846)

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

sched_ext: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters (CVE-2026-46154)

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

btrfs: fix btrfs_ioctl_space_info() slot_count TOCTOU which can lead to info-leak (CVE-2026-46159)

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

btrfs: fix double free in create_space_info_sub_group() error path (CVE-2026-46164)

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

vsock/virtio: fix empty payload in tap skb for non-linear buffers (CVE-2026-46207)

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

drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CVE-2026-46209)

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

vsock/virtio: fix accept queue count leak on transport mismatch (CVE-2026-46214)

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

drm: Set old handle to NULL before prime swap in change_handle (CVE-2026-46215)

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

sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CVE-2026-46227)

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

vsock: fix buffer size clamping order (CVE-2026-46234)

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

media: rc: xbox_remote: heed DMA restrictions (CVE-2026-46236)

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

eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242)

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

io-wq: check that the predecessor is hashed in io_wq_remove_pending() (CVE-2026-46274)

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

netfilter: nf_tables: use list_del_rcu for netlink hooks (CVE-2026-46324)

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 'dnf update kernel6.18 --releasever 2023.12.20260622' or or 'dnf update --advisory ALAS2023-2026-1866 --releasever 2023.12.20260622' to update your system.

Plugin Details

Severity: High

ID: 322020

File Name: al2023_ALAS2023-2026-1866.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/22/2026

Updated: 6/22/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

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-2026-46234

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:kernel6.18-headers, p-cpe:/a:amazon:linux:kernel6.18-modules-extra-common, p-cpe:/a:amazon:linux:kernel6.18-tools-devel, p-cpe:/a:amazon:linux:bpftool6.18-debuginfo, p-cpe:/a:amazon:linux:kernel6.18-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:python3-perf6.18-debuginfo, p-cpe:/a:amazon:linux:kernel6.18, p-cpe:/a:amazon:linux:kernel6.18-tools-debuginfo, p-cpe:/a:amazon:linux:perf6.18, p-cpe:/a:amazon:linux:perf6.18-debuginfo, p-cpe:/a:amazon:linux:kernel6.18-modules-extra, p-cpe:/a:amazon:linux:kernel6.18-tools, p-cpe:/a:amazon:linux:kernel6.18-devel, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:kernel-livepatch-6.18.33-63.124, p-cpe:/a:amazon:linux:kernel6.18-debuginfo, p-cpe:/a:amazon:linux:bpftool6.18, p-cpe:/a:amazon:linux:kernel6.18-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:python3-perf6.18

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: 6/22/2026

Vulnerability Publication Date: 5/27/2026

Reference Information

CVE: CVE-2026-45838, CVE-2026-45839, CVE-2026-45840, CVE-2026-45841, CVE-2026-45842, CVE-2026-45843, CVE-2026-45844, CVE-2026-45846, CVE-2026-46154, CVE-2026-46159, CVE-2026-46164, CVE-2026-46207, CVE-2026-46209, CVE-2026-46214, CVE-2026-46215, CVE-2026-46227, CVE-2026-46234, CVE-2026-46236, CVE-2026-46242, CVE-2026-46274, CVE-2026-46324

Detections

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