RHCOS 4 : OpenShift Container Platform 4.18.35 (RHSA-2026:3875)

high Nessus Plugin ID 311513

Synopsis

The remote Red Hat CoreOS host is missing one or more security updates for OpenShift Container Platform 4.18.35.

Description

The remote Red Hat Enterprise Linux CoreOS 4 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:3875 advisory.

- golang: archive/tar: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183)

- golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)

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 RHCOS OpenShift Container Platform 4.18.35 packages based on the guidance in RHSA-2026:3875.

Plugin Details

Severity: High

ID: 311513

File Name: rhcos-RHSA-2026-3875.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/2/2026

Updated: 5/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

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-2025-61726

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: p-cpe:/a:redhat:enterprise_linux:runc, p-cpe:/a:redhat:enterprise_linux:containernetworking-plugins, p-cpe:/a:redhat:enterprise_linux:skopeo-tests, p-cpe:/a:redhat:enterprise_linux:skopeo, cpe:/o:redhat:enterprise_linux:8:coreos

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: 3/11/2026

Vulnerability Publication Date: 10/23/2025

Reference Information

CVE: CVE-2025-58183, CVE-2025-61726

CWE: 770

RHSA: 2026:3875

Detections

Analytics