{"id":"UBUNTU-CVE-2026-63632","details":"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.","modified":"2026-09-02T19:36:27.289641122Z","published":"2026-08-18T15:16:00Z","upstream":["CVE-2026-63632"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-63632"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-63632"}],"affected":[{"package":{"name":"onnx","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/onnx?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.0+dfsg-3build1","1.7.0+dfsg-3build2","1.7.0+dfsg-3ubuntu1","1.7.0+dfsg-3ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.0+dfsg-3ubuntu2","binary_name":"libonnx-testdata"},{"binary_name":"libonnx1","binary_version":"1.7.0+dfsg-3ubuntu2"},{"binary_version":"1.7.0+dfsg-3ubuntu2","binary_name":"libonnxifi"},{"binary_name":"python3-onnx","binary_version":"1.7.0+dfsg-3ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63632.json"}},{"package":{"name":"onnx","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/onnx?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.13.1-3","1.13.1-3build1","1.14.1-2","1.14.1-2.1","1.14.1-2.1build1","1.14.1-2.1build2","1.14.1-2.1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libonnx-testdata","binary_version":"1.14.1-2.1ubuntu0.1~esm1"},{"binary_name":"libonnx1t64","binary_version":"1.14.1-2.1ubuntu0.1~esm1"},{"binary_name":"python3-onnx","binary_version":"1.14.1-2.1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63632.json"}},{"package":{"name":"onnx","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/onnx?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17.0-3build1","1.20.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libonnx-testdata","binary_version":"1.20.0-1"},{"binary_name":"libonnx1t64","binary_version":"1.20.0-1"},{"binary_name":"python3-onnx","binary_version":"1.20.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63632.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}