CVE-2026-63632

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.3.0 until 1.22.0, onnx.version_converter.convert_version() can perform an out-of-bounds read in Gemm_7_6::adapt_gemm_7_6() in onnx/version_converter/adapters/gemm_7_6.h when a Gemm node has input tensors with fewer than two dimensions because B_shape[1], A_shape[0], or A_shape[1] is accessed without a rank check, potentially causing a process crash during an opset 7 to 6 downgrade. This issue is fixed in version 1.22.0.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63632.json"
}

References

Affected packages

Git / github.com/onnx/onnx

Affected ranges

Type

GIT

Repo

https://github.com/onnx/onnx

Events

Introduced

bae6333e149a59a3faa9c4d9c44974373dcf5256

Fixed

e9c74f596eaa0250f89e52a54160a25bbcb25b66

Fixed

2bb50465112feca9003e1ed654d77f01ff1415ca

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "1.3.0"
        },
        {
            "fixed": "1.22.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v1.*

v1.3.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63632.json"

vanir_signatures

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vanir_signatures_modified

"2026-08-20T10:17:20Z"