CVE-2026-43908

#include <iostream> #include <vector> // Simulating the vulnerable logic void vulnerable_function(int width, int height) { // Assume width * height is large enough to cause overflow int total_pixels = width * height; unsigned char* output_buffer = new unsigned char[total_pixels * 3]; for (int i = 0; i < total_pixels; ++i) { // Vulnerable expression: i * 3 overflows if i is large (e.g., > 0x55555555) int offset = i * 3; // This will write out of bounds if offset is negative/wrapped output_buffer[offset] = 0xFF; output_buffer[offset + 1] = 0xFF; output_buffer[offset + 2] = 0xFF; } delete[] output_buffer; } int main() { // Trigger condition: i needs to be > 715827882 to overflow i*3 in signed 32-bit // This is a conceptual PoC demonstrating the overflow condition. // A real exploit would craft a specific image file format. std::cout << "Attempting to trigger integer overflow..." << std::endl; // vulnerable_function(100000, 10000); // Hypothetical large dimensions return 0; }

{"cve": {"id": "CVE-2026-43908", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:06.920", "lastModified": "2026-05-14T21:21:10.620", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed 32-bit integer overflow in the pixel-loop index expression i * 3 inside ConvertCbYCrYToRGB() causes the function to compute a large negative pointer offset into the output buffer, producing an out-of-bounds write that crashes the process. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}]}], "references": [{"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-2jr5-q49v-3858", "source": "[email protected]"}]}}