RHEL 10 : kpatch-patch-6_12_0-211_16_1 (RHSA-2026:55618)

critical Nessus Plugin ID 337343

Synopsis

The remote Red Hat host is missing one or more security updates for kpatch-patch-6_12_0-211_16_1.

Description

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:55618 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-6.12.0-211.16.1.el10_2.

Security Fix(es):

* kernel: rxrpc: Fix RxGK token loading to check bounds (CVE-2026-31641)

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

* kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)

* kernel: netfilter: nft_inner: Fix IPv6 inner_thoff desync (CVE-2026-46244)

* kernel: net: sched: UAF via missing handler for TC_ACT_CONSUMED in tcf_qevent_handle (CVE-2026-64530)

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-6_12_0-211_16_1 package based on the guidance in RHSA-2026:55618.

Plugin Details

Severity: Critical

ID: 337343

File Name: redhat-RHSA-2026-55618.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 8/18/2026

Updated: 8/18/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

Percentile: 96.89

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-64530

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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:enterprise_linux:10.2, p-cpe:/a:redhat:enterprise_linux:kpatch-patch-6_12_0-211_16_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: 8/17/2026

Vulnerability Publication Date: 4/23/2026

Reference Information

CVE: CVE-2026-31641, CVE-2026-43038, CVE-2026-43329, CVE-2026-46244, CVE-2026-64530

CWE: 190, 431, 770, 823, 843

RHSA: 2026:55618

Detections

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