RHEL 8 : kernel (RHSA-2026:25533)

high Nessus Plugin ID 320887

Synopsis

The remote Red Hat host is missing one or more security updates for kernel.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:25533 advisory.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: nvme: avoid double free special payload (CVE-2024-41073)

* kernel: sctp: fix a potential overflow in sctp_ifwdtsn_skip (CVE-2023-53372)

* kernel: net: use dst_dev_rcu() in sk_setup_caps() (CVE-2025-40170)

* kernel: ipv6: use RCU in ip6_xmit() (CVE-2025-40135)

* kernel: ipv6: use RCU in ip6_output() (CVE-2025-40158)

* kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

* kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)

* kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)

* kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)

* kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)

* kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() (CVE-2026-31532)

* kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)

* kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037)

* kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)

* kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)

* kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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

Update the RHEL kernel package based on the guidance in RHSA-2026:25533.

Plugin Details

Severity: High

ID: 320887

File Name: redhat-RHSA-2026-25533.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 6/12/2026

Updated: 6/12/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

Vendor

Vendor Severity: Critical

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-2026-31532

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:redhat:enterprise_linux:python3-perf, p-cpe:/a:redhat:enterprise_linux:bpftool, p-cpe:/a:redhat:enterprise_linux:kernel-tools, p-cpe:/a:redhat:enterprise_linux:kernel-devel, p-cpe:/a:redhat:enterprise_linux:kernel-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-modules, p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules-extra, cpe:/o:redhat:rhel_aus:8.6, p-cpe:/a:redhat:enterprise_linux:kernel-core, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:kernel-debug, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:perf, p-cpe:/a:redhat:enterprise_linux:kernel-modules-extra

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 6/12/2026

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2023-53372, CVE-2024-41073, CVE-2025-40135, CVE-2025-40158, CVE-2025-40170, CVE-2025-68366, CVE-2025-68724, CVE-2025-71089, CVE-2026-23001, CVE-2026-23216, CVE-2026-31532, CVE-2026-31685, CVE-2026-43037, CVE-2026-43038, CVE-2026-43110, CVE-2026-43190

CWE: 125, 1285, 1287, 190, 366, 413, 416, 820, 825, 843, 911

RHSA: 2026:25533

Detections

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