RHEL 9 : kpatch-patch-5_14_0-70_121_1, kpatch-patch-5_14_0-70_124_1, kpatch-patch-5_14_0-70_132_1, kpatch-patch-5_14_0-70_144_1, and kpatch-patch-5_14_0-70_155_1 (RHSA-2026:3873)

high Nessus Plugin ID 301179

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Synopsis

The remote Red Hat host is missing a security update for kpatch-patch-5_14_0-70_121_1 / kpatch-patch-5_14_0-70_124_1 / kpatch-patch-5_14_0-70_132_1 / kpatch-patch-5_14_0-70_144_1 / kpatch-patch-5_14_0-70_155_1.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:3873 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-5.14.0-70.121.1.el9_0.

Security Fix(es):

* kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)

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 this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL kpatch-patch-5_14_0-70_121_1 / kpatch-patch-5_14_0-70_124_1 / kpatch-patch-5_14_0-70_132_1 / kpatch- patch-5_14_0-70_144_1 / kpatch-patch-5_14_0-70_155_1 packages based on the guidance in RHSA-2026:3873.

Plugin Details

Severity: High

ID: 301179

File Name: redhat-RHSA-2026-3873.nasl

Version: 1.1

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 3/6/2026

Updated: 3/6/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2025-40248

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/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: cpe:/o:redhat:rhel_e4s:9.0, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_121_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_124_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_155_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_132_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-5_14_0-70_144_1

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: 3/5/2026

Vulnerability Publication Date: 12/4/2025

Reference Information

CVE: CVE-2025-40248

CWE: 364

RHSA: 2026:3873

Detections

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