RHEL 8 : kernel-rt (RHSA-2026:83159)

critical Nessus Plugin ID 366000

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-2026:83159 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: Denial of Service due to use-after-free in act_tunnel_key (CVE-2026-68377)

* kernel: ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get (CVE-2026-72262)

* kernel: net/sched: cls_route: fix fastmap use-after-free on filter (CVE-2026-74583)

* kernel: ALSA: usx2y: bound the hwdep mmap fault offset (CVE-2026-74641)

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

* kernel: svcrdma: Validate Read chunk positions before reconstruction (CVE-2026-89526)

* kernel: NFSD: Prevent client use-after-free during blocked-lock reaping (CVE-2026-90036)

* kernel: svcrdma: Reject Write/Reply chunks with segcount 0 (CVE-2026-93228)

* kernel: md/raid5-ppl: fix use-after-free in ppl_do_flush() (CVE-2026-93262)

Bug Fix(es) and Enhancement(s):

* powerpc/pseries: pci - logic bug in SR-IOV enable (JIRA:RHEL-240146)

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: 366000

File Name: redhat-RHSA-2026-83159.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 10/14/2026

Updated: 10/14/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.3

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-2026-90036

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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:U/RL:O/RC:C

CVSS Score Source: CVE-2026-74705

Vulnerability Information

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

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: 10/14/2026

Vulnerability Publication Date: 8/10/2026

Reference Information

CVE: CVE-2026-68377, CVE-2026-72262, CVE-2026-74583, CVE-2026-74641, CVE-2026-74705, CVE-2026-89526, CVE-2026-90036, CVE-2026-93228, CVE-2026-93262

CWE: 125, 416, 787, 825, 839

RHSA: 2026:83159

Detections

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