Bug 2424708 (CVE-2025-12840)

Summary: CVE-2025-12840 OpenEXR: OpenEXR: Remote Code Execution via EXR file parsing heap-based buffer overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in OpenEXR. This heap-based buffer overflow vulnerability occurs during EXR file parsing due to improper validation of user-supplied data length. A remote attacker could exploit this by tricking a user into visiting a malicious page or opening a malicious EXR file. Successful exploitation could lead to arbitrary code execution in the context of the current process.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2424906, 2424909, 2424918, 2424921, 2424904, 2424912, 2424915, 2424924    
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Description OSIDB Bzimport 2025-12-23 22:01:15 UTC 
Academy Software Foundation OpenEXR EXR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Academy Software Foundation OpenEXR. 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 EXR 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-27948.