RHSA-2026:51183: Important: glib2 security update

Published Aug 6, 2026
·
Updated

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 "gdbusnodeinfonewforxml" (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.

Affected Software

23 affected componentsFixes available
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)
Red Hat Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian
redhat/glib2<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-debuginfo<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-debuginfo<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-devel<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-devel<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-doc<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-fam<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-static<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-static<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-tests<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-fam<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-tests<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-debuginfo<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-devel<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-fam<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-static<2.56.1-13.el7_9
2.56.1-13.el7_9
redhat/glib2-tests<2.56.1-13.el7_9
2.56.1-13.el7_9

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/glib2 to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  2. Upgrade

    Upgrade redhat/glib2-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  3. Upgrade

    Upgrade redhat/glib2-devel to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  4. Upgrade

    Upgrade redhat/glib2-doc to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  5. Upgrade

    Upgrade redhat/glib2-fam to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  6. Upgrade

    Upgrade redhat/glib2-static to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  7. Upgrade

    Upgrade redhat/glib2-tests to a version that resolves this vulnerability.

    Fixed in 2.56.1-13.el7_9
  8. Upgrade

    Upgrade glib2 to a version that resolves this vulnerability.

    Patch CVE-2026-58016
  9. Compensating control

    If immediate patching is not possible, reduce exposure of GLib/GIO D-Bus introspection by restricting access to the D-Bus endpoints/services that rely on gio/gdbusintrospection.c (where g_dbus_node_info_new_for_xml is used).

Event History

Aug 6, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·04:45 PM
Data Sourced
via Red Hat·04:45 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:51183?

The severity of RHSA-2026:51183 is classified as high (7).

2

What vulnerability does RHSA-2026:51183 address?

RHSA-2026:51183 addresses an integer underflow vulnerability in the GLib library.

3

How do I fix RHSA-2026:51183?

To fix RHSA-2026:51183, update the GLib packages to the latest version available from Red Hat.

4

What software is affected by RHSA-2026:51183?

RHSA-2026:51183 affects multiple GLib packages including redhat/glib2 and its associated libraries.

5

Is RHSA-2026:51183 critical for system security?

Yes, it's important to address RHSA-2026:51183 as it involves a high severity security vulnerability.

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