Integer underflow in Gnome GLib - CVE-2026-58016

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Main Vulnerability Database Vulnerabilities #VU153171

Integer underflow in Gnome GLib - CVE-2026-58016

Published: October 2, 2026


Vulnerability identifier: #VU153171
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58016
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to state confusion issue exists in g_dbus_node_info_new_for_xml() in the gio/gdbusintrospection.c file when processing malformed D-Bus introspection XML, specifically with a `node` element nested within other elements like `method`, `signal`, `property` or `arg`. A remote attacker can send a specially crafted request to the affected application, trigger an unsigned integer overflow and lead to an out-of-bounds read, resulting in a denial of service.


Affected software

Gnome GLib
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Maximo Application Suite - Monitor Component
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
glib2 (Red Hat package)
glib2
glib2-devel
glib2-static
glib2-tests
glib2-doc

How to mitigate CVE-2026-58016

Install updates from vendor's website.

Gnome GLib - update to 2.88.1
Maximo Application Suite - Monitor Component - addressed in versions 9.0.25, 9.1.15, 9.2.4
glib2 (Red Hat package) - addressed in versions 2.56.1-13.el7_9, 2.56.4-170.el8_10, 2.68.4-7.el9_2.6, 2.80.4-4.el10_0.10, 2.80.4-12.el10_2.14
glib2 - update to 2.68.4-19.0.1
glib2-devel - update to 2.68.4-19.0.1
glib2-static - update to 2.68.4-19.0.1
glib2-tests - update to 2.68.4-19.0.1
glib2-doc - update to 2.68.4-19.0.1

External References

Related Security Bulletins