Bug 2407194 (CVE-2025-10921)

Summary: CVE-2025-10921 gimp: GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A heap-based buffer-overflow in GIMP’s HDR (RGBE) file parsing (CVE-2025-10921 / ZDI-25-910) allows an attacker to execute arbitrary code when a user opens or is tricked into previewing a malicious HDR file. The flaw is caused by missing length validation before copying user-supplied HDR data into a heap buffer, enabling memory corruption and control of program flow.
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Bug Depends On: 2407314, 2407315, 2407316    
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Description OSIDB Bzimport 2025-10-29 20:02:06 UTC 
GIMP HDR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of HDR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-27803.