RHEL 9 : glib2 (RHSA-2026:42089)

critical Nessus Plugin ID 328670

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Synopsis

The remote Red Hat host is missing a security update for glib2.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:42089 advisory.

GLib provides the core application building blocks for libraries and applications written in C. It provides the core object system used in GNOME, the main loop implementation, and a large set of utility functions for strings and common data structures.

Security Fix(es):

* glib: integer underflow in gio/gdbusintrospection.c via g_dbus_node_info_new_for_xml (CVE-2026-58016)

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 this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL glib2 package based on the guidance in RHSA-2026:42089.

Plugin Details

Severity: Critical

ID: 328670

File Name: redhat-RHSA-2026-42089.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/21/2026

Updated: 7/21/2026

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: Medium

Score: 4.3

Percentile: 53.65

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-58016

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:rhel_eus:9.8, p-cpe:/a:redhat:enterprise_linux:glib2-devel, p-cpe:/a:redhat:enterprise_linux:glib2-doc, p-cpe:/a:redhat:enterprise_linux:glib2-static, p-cpe:/a:redhat:enterprise_linux:glib2-tests, p-cpe:/a:redhat:enterprise_linux:glib2

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: 7/20/2026

Vulnerability Publication Date: 6/30/2026

Reference Information

CVE: CVE-2026-58016

CWE: 191

RHSA: 2026:42089

Detections

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