CVE-2026-44512
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
ProductLinuxfoundation Onnx
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linuxfoundation onnx1.22.0 or later
- onnx1.22.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation onnx | 1.9.0 ≤ v < 1.22.0 | 1.22.0 |
| onnxPyPI | 1.9.0 ≤ v < 1.22.0 | 1.22.0 |
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