Low [CVE-2026-63632] Denial of Service via out-of-bounds read in version converter
This low-severity Red Hat Linux advisory covers CVE-2026-63632 affecting Red Hat OpenShift AI (RHOAI).
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Summary
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. This vulnerability, caused by a lack of rank checking, could allow an attacker to trigger a process crash during an opset 7 to 6 downgrade, leading to a Denial of Service (DoS).
Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L). Weakness: CWE-125.
Affected Red Hat products: Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 60 minutes ago·verify at source
- 1.22.0
Official advisory · high-confidence parse· fetched 60 minutes ago·verify at source
Mitigation
Upgrade to a fixed release: 1.22.0. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 60 minutes ago·verify at source
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