{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63632", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-17T14:11:15.482Z", "datePublished": "2026-08-18T14:55:15.923Z", "dateUpdated": "2026-08-18T14:55:15.923Z"}, "containers": {"cna": {"title": "ONNX: Heap-Buffer-Overflow READ in Gemm Version Converter Adapter via Undersized Input Shape", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9"}, {"name": "https://github.com/onnx/onnx/pull/7880", "tags": ["x_refsource_MISC"], "url": "https://github.com/onnx/onnx/pull/7880"}, {"name": "https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66", "tags": ["x_refsource_MISC"], "url": "https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66"}, {"name": "https://github.com/onnx/onnx/releases/tag/v1.22.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/onnx/onnx/releases/tag/v1.22.0"}], "affected": [{"vendor": "onnx", "product": "onnx", "versions": [{"version": ">= 1.3.0, < 1.22.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-18T14:55:15.923Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-p893-rvq9-2xf9", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "onnx", "vendor": "onnx", "versions": [{"status": "affected", "version": ">= 1.3.0, < 1.22.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-63632", "lastModified": "2026-08-18T15:16:56.463", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-18T15:16:56.463", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66"}, {"source": "security-advisories@github.com", "url": "https://github.com/onnx/onnx/pull/7880"}, {"source": "security-advisories@github.com", "url": "https://github.com/onnx/onnx/releases/tag/v1.22.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-08-18T16:45:04.543876+00:00", "updated": "2026-08-18T16:45:04.543881+00:00", "vendors": []}