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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.
Classification
CVE ID: CVE-2025-4373
Problem Types
Buffer Underwrite ('Buffer Underflow')Affected Products
Vendor: Red Hat
Product: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 15.8% (scored less or equal to compared to others)
EPSS Date: 2025-06-04 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-4373https://access.redhat.com/security/cve/CVE-2025-4373
https://bugzilla.redhat.com/show_bug.cgi?id=2364265