Bug 2421339 (CVE-2025-14512)

Summary: CVE-2025-14512 glib: Integer Overflow in GLib GIO Attribute Escaping Causes Heap Buffer Overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in glib. This vulnerability allows a heap buffer overflow and denial-of-service (DoS) via an integer overflow in GLib's GIO (GLib Input/Output) escape_byte_string() function when processing malicious file or remote filesystem attribute values.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2421342, 2421344, 2421343, 2421345    
Bug Blocks:    

Description OSIDB Bzimport 2025-12-11 06:30:14 UTC 
This vulnerability stems from an integer overflow in GLib’s GIO escape_byte_string() function, where the count of invalid characters is multiplied using a signed integer, resulting in a too-small memory allocation for escaped output. When a malicious file or remote filesystem supplies attribute values with a large number of invalid bytes, the subsequent escaping loop writes beyond the allocated buffer, triggering a heap buffer overflow and crashing the process.