CVE-2025-4373

Glib: buffer underflow on glib through glib/gstring.c via function g_string_insert_unichar

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.

Remediation

Workaround:

  • Currently, no mitigation is available for this vulnerability.

Category

4.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Affected: Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
Affected: Red Hat Red Hat Insights proxy 1.5
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat OpenShift distributed tracing 3.6.1
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2025:10855 vendor advisory
https://access.redhat.com/errata/RHSA-2025:11140 vendor advisory
https://access.redhat.com/errata/RHSA-2025:11327 vendor advisory
https://access.redhat.com/errata/RHSA-2025:11373 vendor advisory
https://access.redhat.com/errata/RHSA-2025:11374 vendor advisory
https://access.redhat.com/errata/RHSA-2025:11662 vendor advisory
https://access.redhat.com/errata/RHSA-2025:12275 vendor advisory
https://access.redhat.com/errata/RHSA-2025:13335 vendor advisory
https://access.redhat.com/security/cve/CVE-2025-4373 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2364265 issue tracking
https://gitlab.gnome.org/GNOME/glib/-/issues/3677

Frequently Asked Questions

What is the severity of CVE-2025-4373?
CVE-2025-4373 has been scored as a medium severity vulnerability.
How to fix CVE-2025-4373?
As a workaround for remediating CVE-2025-4373: Currently, no mitigation is available for this vulnerability.
Is CVE-2025-4373 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-4373 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-4373?
CVE-2025-4373 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Red Hat Insights proxy 1.5, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat OpenShift distributed tracing 3.6.1, Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.
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