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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-476"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44512.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:linuxfoundation:onnx:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.9.0"
},
{
"fixed": "1.22.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "cd310408165ad47c3cd7eb2b86cb5b80aa2e4fdf"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v1.22.0",
"range": [
{
"fixed": "2bb50465112feca9003e1ed654d77f01ff1415ca"
}
],
"source": "REFERENCES_TAG"
}
]
}