CVE-2026-4731 in ART
Summary
by MITRE • 03/24/2026
Integer Overflow or Wraparound vulnerability in artraweditor ART (rtengine modules). This vulnerability is associated with program files dcraw.C.
This issue affects ART: before 1.25.12.
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Analysis
by VulDB Data Team • 03/28/2026
The CVE-2026-4731 vulnerability represents a critical integer overflow or wraparound condition within the artraweditor ART software suite, specifically within the rtengine modules. This flaw manifests in the dcraw.C program files that form part of the broader ART ecosystem. The vulnerability stems from improper handling of integer arithmetic operations that can lead to unexpected behavior when large values are processed. The issue affects all versions of ART prior to 1.25.12, indicating a widespread exposure across multiple releases of the software. Integer overflow vulnerabilities typically occur when a computation produces a result that exceeds the maximum value that can be stored in the target data type, causing the value to wrap around to a much smaller number. This particular vulnerability is classified under CWE-190, which specifically addresses integer overflow conditions that can result in unexpected program behavior, memory corruption, or privilege escalation opportunities.
The technical exploitation of this vulnerability occurs within the raw image processing capabilities of the ART software, where dcraw.C handles various image format conversions and processing tasks. When the software encounters image data with malformed or exceptionally large integer values in metadata fields or image headers, the arithmetic operations can overflow and wrap around to negative or unexpected positive values. This creates a potential attack surface where malicious actors could craft specially formatted image files designed to trigger the overflow condition. The operational impact extends beyond simple program crashes, as the wraparound behavior could potentially lead to memory corruption, buffer overflows, or other memory safety issues that might be exploited to execute arbitrary code. The vulnerability is particularly concerning in environments where the software processes untrusted image data from external sources, as it could enable remote code execution or privilege escalation attacks.
From a cybersecurity perspective, this vulnerability aligns with several ATT&CK techniques including T1203, which covers exploitation for privilege escalation, and T1059, covering command and scripting interpreter usage. The integer overflow condition provides a potential pathway for attackers to manipulate program flow and gain elevated privileges within the system. Organizations using affected versions of ART should prioritize immediate remediation through the upgrade to version 1.25.12 or later, which includes patches addressing the integer wraparound issue. Additionally, implementing input validation controls and sanitization measures for raw image processing workflows can provide additional defense-in-depth. The vulnerability demonstrates the importance of proper integer handling in image processing libraries and underscores the need for comprehensive testing of edge cases in multimedia processing software. Security teams should monitor for any exploitation attempts targeting this specific vulnerability and consider implementing network segmentation controls to limit exposure of systems running affected software versions. The fix implemented in version 1.25.12 likely includes bounds checking mechanisms and proper integer overflow protection to prevent the wraparound conditions that previously allowed malicious inputs to compromise system integrity.