#VU109848 Integer overflow in Gnome GLib - CVE-2025-4373

Vulnerability identifier: #VU109848

Vulnerability risk: High

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-4373

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gnome GLib
Universal components / Libraries / Libraries used by multiple products

Vendor: Gnome Development Team

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow within the g_string_insert_unichar() function in glib/gstring.c. A remote attacker can pass specially crafted data to the application, trigger an integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gnome GLib: 2.0 - 2.84.1

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External links
https://access.redhat.com/security/cve/CVE-2025-4373
https://bugzilla.redhat.com/show_bug.cgi?id=2364265

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?