RHEL 9 : kernel-rt (RHSA-2022:8974)

high Nessus Plugin ID 168709

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Synopsis

The remote Red Hat host is missing one or more security updates for kernel-rt.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2022:8974 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: KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)

* kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() (CVE-2022-2639)

* kernel: watch queue race condition can lead to privilege escalation (CVE-2022-2959)

* kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)

* hw: cpu: incomplete clean-up of multi-core shared buffers (aka SBDR) (CVE-2022-21123)

* hw: cpu: incomplete clean-up of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)

* hw: cpu: incomplete clean-up in specific special register write operations (aka DRPW) (CVE-2022-21166)

* hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-23816, CVE-2022-29900)

* hw: cpu: AMD: Branch Type Confusion (non-retbleed) (CVE-2022-23825)

* hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions (CVE-2022-26373)

* hw: cpu: Intel: RetBleed Arbitrary Speculative Code Execution with Return Instructions (CVE-2022-29901)

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.

Bug Fix(es):

* kernel-rt: update RT source tree to the latest RHEL-9.0.z5 Batch (BZ#2137580)

* [DELL EMC 9.0-RT BUG] System is not booting into RT Kernel with perc12 [kernel-rt] (BZ#2139864)

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 kernel-rt package based on the guidance in RHSA-2022:8974.

Plugin Details

Severity: High

ID: 168709

File Name: redhat-RHSA-2022-8974.nasl

Version: 1.9

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 12/13/2022

Updated: 9/12/2025

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

Risk Information

VPR

Risk Factor: High

Score: 8.9

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

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

CVSS Score Source: CVE-2022-29900

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

CVSS Score Source: CVE-2022-2639

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, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug, cpe:/o:redhat:rhel_eus:9.0, p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm, 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 Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/13/2022

Vulnerability Publication Date: 6/6/2022

Reference Information

CVE: CVE-2022-1158, CVE-2022-21123, CVE-2022-21125, CVE-2022-21166, CVE-2022-23825, CVE-2022-26373, CVE-2022-2639, CVE-2022-28693, CVE-2022-2959, CVE-2022-29900, CVE-2022-29901, CVE-2022-43945

CWE: 200, 362, 416, 459, 681, 770

RHSA: 2022:8974

Detections

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