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.
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Score 4.8 from GitHub Security Advisory published 2025-05-06. NVD baseline CVSS 4.8; sources differ by 0.0.
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.
May 6, 2025
May 12, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Glib: buffer underflow on glib through glib/gstring.c via function g_string_insert_unichar
Red Hat Security Advisory: Insights proxy Container Image
Red Hat Security Advisory: glib2 security update
Red Hat Security Advisory: glib2 security update
Red Hat Security Advisory: glib2 security update
Red Hat Security Advisory: glib2 security update
Red Hat Security Advisory: glib2 security update
Red Hat Security Advisory: glib2 security update
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | libglib2.0-tests (2.80.0-6ubuntu3.4) @ noble | 2026-05-21 | ubuntu |
| redhat | glib2-0:2.56.4-158.el8_6.2 | 2025-09-02 | redhat |
| redhat | glib2-0:2.56.4-162.el8_8 | 2025-09-02 | redhat |
| redhat | glib2-0:2.56.4-10.el8_4.2 | 2025-09-02 | redhat |
| redhat | glib2-0:2.56.4-8.el8_2.2 | 2025-09-02 | redhat |
| redhat | insights-proxy/insights-proxy-container-rhel9:1.5.5-1754504343 | 2025-08-07 | redhat |
| redhat | glib2-0:2.68.4-5.el9_0.2 | 2025-07-30 | redhat |
| redhat | rhosdt/jaeger-rhel8-operator:rhosdt-3.6-1753265314 | 2025-07-23 | redhat |
| redhat | glib2-0:2.68.4-7.el9_2.2 | 2025-07-17 | redhat |
| redhat | glib2-0:2.68.4-14.el9_4.3 | 2025-07-17 | redhat |
| redhat | glib2-0:2.56.4-166.el8_10 | 2025-07-16 | redhat |
| redhat | glib2-0:2.68.4-16.el9_6.2 | 2025-07-15 | redhat |
| redhat | glib2-0:2.80.4-4.el10_0.6 | 2025-07-14 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
RHSA-2025:11662 — Moderate
RHSA-2025:14988 — Moderate
RHSA-2025:14989 — Moderate
RHSA-2025:14990 — Moderate
RHSA-2025:14991 — Moderate
GLib vulnerability
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-4373
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msrc · redhat
CWE-124