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RHEL 8 : kpatch-patch-4_18_0-477_107_1, kpatch-patch-4_18_0-477_120_1, kpatch-patch-4_18_0-477_130_1, and kpatch-patch-4_18_0-477_97_1 (RHSA-2026:36531)

medium Nessus Plugin ID 325597

Synopsis

The remote Red Hat host is missing one or more security updates for kpatch-patch-4_18_0-477_107_1 / kpatch- patch-4_18_0-477_120_1 / kpatch-patch-4_18_0-477_130_1 / kpatch-patch-4_18_0-477_97_1.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:36531 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-4.18.0-477.97.1.el8_8.

 Security Fix(es):

 * kernel: Linux kernel KVM: Privilege escalation or denial of service due to improper shadow page table entry handling (CVE-2026-23401)

 * kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (CVE-2026-31402)

 * kernel: Linux kernel: Use-after-free in bonding driver leads to denial of service (CVE-2026-31419)

 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_0-477_107_1 / kpatch-patch-4_18_0-477_120_1 / kpatch-patch-4_18_0-477_130_1 / kpatch- patch-4_18_0-477_97_1 packages based on the guidance in RHSA-2026:36531.

See Also

https://access.redhat.com/errata/RHSA-2026:36531

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2453803

https://bugzilla.redhat.com/show_bug.cgi?id=2454844

https://bugzilla.redhat.com/show_bug.cgi?id=2457829

http://www.nessus.org/u?574e1294

Plugin Details

Severity: Medium

ID: 325597

File Name: redhat-RHSA-2026-36531.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/8/2026

Updated: 7/8/2026

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: Medium

Score: 6.9

Percentile: 96.92

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-23401

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-477_97_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-477_107_1, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-477_120_1, cpe:/o:redhat:rhel_e4s:8.8, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-4_18_0-477_130_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: 7/8/2026

Vulnerability Publication Date: 4/1/2026

Reference Information

CVE: CVE-2026-23401, CVE-2026-31402, CVE-2026-31419

CWE: 416, 787

RHSA: 2026:36531