ONNX: Null Pointer Dereference in ScanInferenceFunction Due to Missing Required Attribute

影響: pip:onnx >= 1.4.0, <= 1.21.0 → 1.22.0

ONNX shape inference did not safely validate the required Scan num_scan_inputs attribute. Two malformed values could terminate or disrupt the process: 1. If the attribute was missing, ctx.getAttribute("num_scan_inputs") returned null and was dereferenced. 2. If the attribute was negative, conversion to size_t produced a very large value that reached a vector allocation and raised std::length_error. The negative-value variant passed onnx.checker.check_model() before reaching shape inference. Tec…

Read on GitHub Advisory Database

On 10/29/2026, 06:16 AM, GitHub Advisory Database published "ONNX: Null Pointer Dereference in ScanInferenceFunction Due to Missing Required Attribute" (type: Advisory). Severity is "Medium" (medium). Related technologies: Python. CVE: CVE-2026-115921.