NULL pointer dereference in Linuxfoundation Onnx
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.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.
EPSS: 0.002 (8.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Linuxfoundation Onnx
- Onnx — versions >= 1.9.0, < 1.22.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-44512?
- CVE-2026-44512 is a medium-severity vulnerability in Linuxfoundation Onnx, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-07-08.
- How severe is CVE-2026-44512?
- Medium severity. CVSS v3 base score is 5.5 out of 10.