CVE-2026-44512: Linuxfoundation Onnx

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linuxfoundation Onnx: from 1.9.0, before 1.22.0 (fixed in 1.22.0)

Published 2026-07-08. Last modified 2026-07-13.