RHEL 8 : kpatch-patch-4_18_0-553_109_1, kpatch-patch-4_18_0-553_125_1, kpatch-patch-4_18_0-553_158_1, kpatch-patch-4_18_0-553_72_1, and kpatch-patch-4_18_0-553_85_1 (RHSA-2026:95587)

critical Nessus Plugin ID 376916

Synopsis

The remote Red Hat host is missing one or more security updates for kpatch-patch-4_18_0-553_109_1 / kpatch- patch-4_18_0-553_125_1 / kpatch-patch-4_18_0-553_158_1 / kpatch-patch-4_18_0-553_72_1 / kpatch-patch-4_18_0-553_85_1.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:95587 advisory.

This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-4.18.0-553.109.1.el8_10.

Security Fix(es):

* kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923)

* kernel: udp: fix potential use-after-free in tunnel segmentation (CVE-2026-74705)

* kernel: net: tun: bound receive headroom (CVE-2026-81000)

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 kpatch-patch-4_18_0-553_109_1 / kpatch-patch-4_18_0-553_125_1 / kpatch-patch-4_18_0-553_158_1 / kpatch- patch-4_18_0-553_72_1 / kpatch-patch-4_18_0-553_85_1 packages based on the guidance in RHSA-2026:95587.

Plugin Details

Severity: Critical

ID: 376916

File Name: redhat-RHSA-2026-95587.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 11/6/2026

Updated: 11/6/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 98.94

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-74705

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 9

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-553_109_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-553_125_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-553_158_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-553_72_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-553_85_1

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/5/2026

Vulnerability Publication Date: 6/24/2026

Reference Information

CVE: CVE-2026-52923, CVE-2026-74705, CVE-2026-81000

CWE: 416, 787, 825

RHSA: 2026:95587

Detections

Analytics