Detections
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RHCOS 4 : Red Hat build of MicroShift 4.21.31 (RHSA-2026:60668)

high Nessus Plugin ID 342101

Synopsis

The remote Red Hat CoreOS host is missing a security update for Red Hat build of MicroShift 4.21.31.

Description

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:60668 advisory.

 - net/http/internal/http2: golang: golang.org/x/net: Go HTTP/2: Denial of Service via malformed SETTINGS_MAX_FRAME_SIZE frame (CVE-2026-33814)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHCOS Red Hat build of MicroShift 4.21.31 package based on the guidance in RHSA-2026:60668.

See Also

https://access.redhat.com/errata/RHSA-2026:60668

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

https://bugzilla.redhat.com/show_bug.cgi?id=2467815

http://www.nessus.org/u?9900471d

Plugin Details

Severity: High

ID: 342101

File Name: rhcos-RHSA-2026-60668.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/1/2026

Updated: 9/1/2026

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: Low

Score: 3

Percentile: 23.63

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-33814

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9:coreos, p-cpe:/a:redhat:enterprise_linux:microshift-ai-model-serving-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-ai-model-serving, p-cpe:/a:redhat:enterprise_linux:microshift-cert-manager-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-cert-manager, p-cpe:/a:redhat:enterprise_linux:microshift-gateway-api-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-gateway-api, p-cpe:/a:redhat:enterprise_linux:microshift-greenboot, p-cpe:/a:redhat:enterprise_linux:microshift-low-latency, p-cpe:/a:redhat:enterprise_linux:microshift-multus-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-multus, p-cpe:/a:redhat:enterprise_linux:microshift-networking, p-cpe:/a:redhat:enterprise_linux:microshift-observability, p-cpe:/a:redhat:enterprise_linux:microshift-olm-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-olm, p-cpe:/a:redhat:enterprise_linux:microshift-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-selinux, p-cpe:/a:redhat:enterprise_linux:microshift-sriov-release-info, p-cpe:/a:redhat:enterprise_linux:microshift-sriov, p-cpe:/a:redhat:enterprise_linux:microshift

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: 9/1/2026

Vulnerability Publication Date: 5/7/2026

Reference Information

CVE: CVE-2026-33814

CWE: 606

RHSA: 2026:60668