RHEL 8 : kernel-rt (RHSA-2026:27354)

critical Nessus Plugin ID 321812

Synopsis

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

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:27354 advisory.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

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

* kernel: drm/amd/display: Do not skip unrelated mode changes in DSC validation (CVE-2026-31488)

* kernel: net: mana: fix use-after-free in add_adev() error path (CVE-2026-43056)

* kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)

* kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)

* kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop (CVE-2026-46090)

* kernel: RDMA/mana: Validate rx_hash_key_len (CVE-2026-46145)

* kernel: nvmet-tcp: fix race between ICReq handling and queue teardown (CVE-2026-46135)

Bug Fix(es) and Enhancement(s):

* RHEL8 RT kernel panic in replenish_dl_entity() caused by stale DEADLINE PI state during rt_mutex de- boosting (JIRA:RHEL-178520)

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 affected packages.

Plugin Details

Severity: Critical

ID: 321812

File Name: redhat-RHSA-2026-27354.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 6/21/2026

Updated: 6/21/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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-2026-46135

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: p-cpe:/a:redhat:enterprise_linux:kernel-rt, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel, p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm, p-cpe:/a:redhat:enterprise_linux:kernel-rt-core, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-rt-modules-extra, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-modules

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: 6/19/2026

Vulnerability Publication Date: 4/13/2026

Reference Information

CVE: CVE-2026-31419, CVE-2026-31488, CVE-2026-43056, CVE-2026-43279, CVE-2026-46090, CVE-2026-46135, CVE-2026-46145, CVE-2026-46331

CWE: 1288, 1341, 364, 416, 787, 825

RHSA: 2026:27354

Detections

Analytics