High severity · published Jun 13, 2025
CVE-2025-6052
Glib: integer overflow in g_string_maybe_expand() leading to potential buffer overflow in glib gstring
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
A flaw was found in how GLib’s GString manages memory when adding data to strings. If a string is already very large, combining it with more input can cause a hidden overflow in the size calculation. This makes the system think it has enough memory when it doesn’t. As a result, data may be written past the end of the allocated memory, leading to crashes or memory corruption.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
GL
Glib · Gnome
2.75.3 through 2.84.3 · source: NVD
RR
RUGGEDCOM RST2428P · Siemens
before V4.0 · source: CISA
SC
SIMATIC CN 4100 · Siemens
before V5.0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6052
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6052
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2025-6052
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2372666
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-032379.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-253495.html
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