CVE-2026-44512

MEDIUM5.5

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

Published Jul 8, 2026

Modified 6 days ago

Details

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.9.0 before 1.22.0, onnx.version_converter.convert_version() can dereference a null pointer in Upsample_6_7::adapt_upsample_6_7() in onnx/version_converter/adapters/upsample_6_7.h when processing an untrusted model with an Upsample node that has zero inputs, causing an unrecoverable denial of service. This issue is fixed in version 1.22.0.

References

WEB

https://github.com/onnx/onnx/commit/cd310408165ad47c3cd7eb2b86cb5b80aa2e4fdf

WEB

https://github.com/onnx/onnx/pull/7813

WEB

https://github.com/onnx/onnx/releases/tag/v1.22.0

DETECTION

https://github.com/onnx/onnx/security/advisories/GHSA-hwpq-hmq9-wj77

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-44512

CVSS Analysis