CVE-2026-44512

Open Neural Network Exchange ONNX is an open standard for machine learning interoperability. From 1.9.0 before 1.22.0, onnx.versionconverter.convertversion can dereference a null pointer in Upsample67::adaptupsample67 in onnx/versionconverter/adapters/upsample67.h when processing an untrusted mod...

GHSA-HWPQ-HMQ9-WJ77 ONNX has Null Pointer Dereference in Upsample Version Converter Adapter (Zero Inputs)

Summary Null pointer dereference SIGSEGV in Upsample67::adaptupsample67 onnx/versionconverter/adapters/upsample67.h:31 when convertversion processes a model with an Upsample node that has zero inputs. The adapter accesses node-inputs0-sizes without checking input count. 107-byte PoC crashes on...

ONNX has Null Pointer Dereference in Upsample Version Converter Adapter (Zero Inputs)

Summary Null pointer dereference SIGSEGV in Upsample67::adaptupsample67 onnx/versionconverter/adapters/upsample67.h:31 when convertversion processes a model with an Upsample node that has zero inputs. The adapter accesses node-inputs0-sizes without checking input count. 107-byte PoC crashes on...

PT-2026-56215

Name of the Vulnerable Software and Affected Versions Open Neural Network Exchange ONNX versions 1.9.0 through 1.21.0 Description Processing an untrusted model with an Upsample node containing zero inputs can lead to an unrecoverable denial of service. The issue occurs when the onnx.version...