CVE-2025-4373

MEDIUM
Published May 6, 2025 Modified May 12, 2026 CWE-124

Description

A flaw was found in GLib, which is vulnerable to an integer overflow in the g_string_insert_unichar() function. When the position at which to insert the character is large, the position will overflow, leading to a buffer underwrite.

Is your site exposed to CVE-2025-4373?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

4.8
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Weakness Type (CWE)

CWE-124 CWE-124

References

Frequently Asked Questions

What is CVE-2025-4373? +
A flaw was found in GLib, which is vulnerable to an integer overflow in the g_string_insert_unichar() function. When the position at which to insert the character is large, the position will overflow, leading to a buffer underwrite. It has a CVSS v3.1 base score of 4.8 (MEDIUM).
How severe is CVE-2025-4373? +
CVE-2025-4373 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
How do I check if I'm vulnerable to CVE-2025-4373? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2024-36343

Improper input validation in the System Management Mode (SMM) communications buffer could allow a privileged attacker to perform an out …
CVE-2026-16439

In Eclipse OpenJ9 versions up to 0.60, using -Xtrace to trace method arguments can lead to buffer underflow.
CVE-2026-26199

HDF5 is a high-performance library and a file format specification that implements the HDF5 data model. If `H5Iget_name` is invoked …
CVE-2026-44631 9.8

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: …
CVE-2023-25610 9.8

A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of Fortinet FortiOS version 7.2.0 through 7.2.3, version 7.0.0 through …
CVE-2025-27439 8.5

Buffer underflow in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via network …

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2025-4373 — free, no signup required.